/*
  HighBeam Research utility functions
  copyright 2003, justin blecher / digital pulp, inc.
*/


// == global vars ==============================================================

// tests for DHTML capability
var capable = (document.getElementById) ? true : false;

// variables for iframe setup
var IFRAME_URL = "/prefs/saveprefs.asp";
var IFRAME_ID = "hbr_server_comm";

// classes and ids of page elements used in dhtml
/*
  NOTE:
  certain functions below rely upon specific JS variables and CSS IDs and CLASSes
  if you modify any HTML or CSS, and you start getting JS errors, check here!
*/
var NAVTAVBS_ID = "tabs";
var DISPLAYSETTINGS_ID = "displaySettings";
var LISTINGCONTENT_ID = "listingContent";
var LOGO_CLASS = "logo";
var SUMMARY_CLASS = "summary";
var SEARCHING_CLASS = "searching";
var CONTENT = "content";
var DISPLAY_SETTINGS_FORM_NAME = "display_setttings_form";
var SHOWELIB = "showelib";
var NEWWINDOWWEB = "newwindowweb";



//DHTML textbox character counter (IE4+) script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)


function taLimit() {
	var taObj=event.srcElement;
	if (taObj.value.length==taObj.maxLength*1) return false;
}

function taCount(visCnt) { 
	var taObj=event.srcElement;
	if (taObj.value.length>taObj.maxLength*1) taObj.value=taObj.value.substring(0,taObj.maxLength*1);
	if (visCnt) visCnt.innerText=taObj.maxLength-taObj.value.length;
}

// == display settings utility functions =======================================

function updateFontSelectMenu(form) {
	var form_to_use;

	if ( (!document.forms[DISPLAY_SETTINGS_FORM_NAME]) || (typeof(alt_css) == 'undefined')) return;

	document.forms[DISPLAY_SETTINGS_FORM_NAME].ds_font_style.options.selectedIndex = (alt_css.getValueForProperty('font') == 'serif') ? 1 : 0;
} // END: updateFontSelectMenu()


function updateFontSizeLinks() {
	var font_size_abbr;

	if (typeof(alt_css) == 'undefined') return;

	switch (alt_css.getValueForProperty('size')) {
		case 'small': font_size_abbr = "S"; break;
		case 'medium': font_size_abbr = "M"; break;
		case 'large': font_size_abbr = "L"; break;
		case 'xlarge': font_size_abbr = "XL"; break;
		default: font_size_abbr = "M";
	}

	showSizeFeedback('size' + font_size_abbr);
} // END: updateFontSizeLinks()


function fixTabs() {
	var tab_wrapper = document.getElementById(NAVTAVBS_ID);
	var tabs = tab_wrapper.getElementsByTagName('li');

	for (var i=0; i < tabs.length; i++) {
		if (tabs[i].className != 'active'){
			tabs[i].onclick = function(e) {
				location.href = this.firstChild.firstChild.href;
			}; // end function
		}
	}
} // END: fixTabs()


function showSizeFeedback(id) {

	var el, container, all_links;

	if (!(el = document.getElementById(id))) return;

	container = document.getElementById(DISPLAYSETTINGS_ID);
	all_links = container.getElementsByTagName('a');

	for (var i=0; i < all_links.length; i++) {
		if (all_links[i].id.indexOf('size') != -1) all_links[i].style.color = "#C00";
	}

	el.style.color = "#666";
	
} // END: sizeFeedback()


// == display settings functions ===============================================

function toggleLogos(el) {
	var results_list = document.getElementById(LISTINGCONTENT_ID);
	var all_images = results_list.getElementsByTagName('img');

	for (var i=0; i < all_images.length; i++) {
		if (all_images[i].className == LOGO_CLASS) all_images[i].style.display = (all_images[i].style.display == 'none') ? 'inline' : 'none';
	}

	saveDisplaySettingToProfile('show_logos', el.checked);
} // END: toggleLogos()

function toggleRefLogos(el) {
	var results_list = document.getElementById(LISTINGCONTENT_ID);
	var all_images = results_list.getElementsByTagName('img');

	for (var i=0; i < all_images.length; i++) {
		if (all_images[i].className == LOGO_CLASS) all_images[i].style.display = (all_images[i].style.display == 'none') ? 'inline' : 'none';
	}

	saveDisplaySettingToProfile('show_reflogos', el.checked);
} // END: toggleRefLogos()

// 
function toggleLinks(el) {
	// Looks for all resultlinks and changes the target
	// Input: checkbox
	var all_results = document.getElementsByName('resultlink');
	var newtarget;
	if (el.checked){ newtarget = '_blank';}else{ newtarget = '_self';}
	for (var i=0; i < all_results.length; i++) { all_results[i].target = newtarget; }
	saveDisplaySettingToProfile('open_links', el.checked);
} // END: toggleLinks()



function toggleLinksWeb(el) {
	
	var results_list = document.getElementById(LISTINGCONTENT_ID);
	var all_links = results_list.getElementsByTagName('a');
	
	for (var i=0; i < all_links.length; i++) {
		all_links[i].target = (all_links[i].target == '_blank') ? '_self' : '_blank';
	}
	
	saveDisplaySettingToProfile('open_linksWeb', el.checked);
	

}// END: toggleLinksWeb()

function toggleLinksExec(el) {
	
	var results_list = document.getElementById(LISTINGCONTENT_ID);
	var all_links = results_list.getElementsByTagName('a');
	
	for (var i=0; i < all_links.length; i++) {
		all_links[i].target = (all_links[i].target == '_blank') ? '_self' : '_blank';
	}
	
	saveDisplaySettingToProfile('open_linksExec', el.checked);
	

}// END: toggleLinksExec()

function toggleSummaries(el) {
	var results_list = document.getElementById(LISTINGCONTENT_ID);
	var all_items = results_list.getElementsByTagName('div');

	for (var i=0; i < all_items.length; i++) {
		if (all_items[i].className == SUMMARY_CLASS) all_items[i].style.display = (all_items[i].style.display == 'none') ? 'block' : 'none';
	}

	saveDisplaySettingToProfile('show_summaries', el.checked);
} // END: toggleSummaries()



function toggleElib(el) {
	
	if (el.checked)
	{
		document.getElementById("SHOWELIB").style.display = 'block'
		document.getElementById("SHOWELIB1").style.display = 'block'
		document.getElementById("dsShowElib").checked = true;
		document.getElementById("dsShowElib1").checked = true;
	}	
	else
	{
		document.getElementById("SHOWELIB").style.display = 'none'
		document.getElementById("SHOWELIB1").style.display = 'none'
		document.getElementById("dsShowElib").checked = false;
		document.getElementById("dsShowElib1").checked = false;
	}
	saveDisplaySettingToProfile('show_elib', el.checked);



} //END: toggleElib()	

function toggleSearching(el) {
	var results_list = document.getElementById(CONTENT);
	var all_items = results_list.getElementsByTagName('div');

	for (var i=0; i < all_items.length; i++) {
		if (all_items[i].id == LISTINGCONTENT_ID) all_items[i].style.display = 'none';
		if (all_items[i].id == 'listingHeader') all_items[i].style.display = 'none';
		if (all_items[i].id == 'listingFooter') all_items[i].style.display = 'none';
		if (all_items[i].className == SEARCHING_CLASS) all_items[i].style.display = 'block' ;
	}
} // END: toggleSearching()


function toggleSearchingIndex(el) {
	var results_list = document.getElementById(CONTENT);
	var all_items = results_list.getElementsByTagName('div');

	for (var i=0; i < all_items.length; i++) {
		if (all_items[i].id == 'groups') all_items[i].style.display = 'none';
		if (all_items[i].className == SEARCHING_CLASS) all_items[i].style.display = 'block' ;
	}
} // END: toggleSearching()



//Used to replace all html and text between the specified span tag.
//spanid = id of span tag
//text1 = text or html first displayed on the page
//text2 = text you want to toggle to
function rewrite(spanid, text1, text2) {
	if (document.getElementById(spanid).innerHTML == text1){
		document.getElementById(spanid).innerHTML = text2;
	}
	else{
		document.getElementById(spanid).innerHTML = text1;
	}
} // end rewrite



function saveDisplaySettingToProfile(pref, value) {
      ts = new Date();
	 
	createCommChannel();
	document.getElementById(IFRAME_ID).src = IFRAME_URL + "?" + pref + "=" + value + "&time=" + ts.getTime();
	destroyCommChannel();
	
} // END: saveDisplaySettingToProfile()


// == metasearch functions ===========================================
// This function calls the function to toggle the searching text, 
// then submits the current form.
function submit_metaform()
{
  toggleSearching(this);
  document.searchForm.submit();
}
function submit_metaform_index()
{
  toggleSearchingIndex(this);
  document.searchForm.submit();
}


// == iframe communication functions ===========================================
/*
	NOTE: we need to create and destroy this each time the function is called so the 
	browser history doesn't get clogged up with iframe 'navigation'
*/
function createCommChannel() {
	
	
		var iframe_parent, iframe;

	iframe = document.getElementById(IFRAME_ID);
	if (iframe == null)
	{
		iframe = document.createElement('iframe');
		iframe.id = IFRAME_ID;
		iframe.style.visibility = "hidden";
		iframe.style.width = 1 + "px";
		iframe.style.height = 1 + "px";

		iframe_parent = document.getElementsByTagName('body')[0];
		iframe_parent.appendChild(iframe);
	}
} // END: createCommChannel()


function destroyCommChannel() {
	//alert ('beforedestroy');
	//document.getElementsByTagName('body')[0].removeChild(document.getElementsByTagName('body')[0].lastChild);
	
} // END: destroyCommChannel()


// == radio/checkbox toggle functions ==========================================

function adjustSearchType(obj) {
	var looking_for = (obj.type == "checkbox") ? "radio" : "checkbox";

	for (var i=0; i < document.forms[obj.form.name].length; i++ ) {
		if (document.forms[obj.form.name].elements[i].type == looking_for) document.forms[obj.form.name].elements[i].checked = false;
	}
} // END: adjustSearchType()


// == window pop functions =====================================================

function saveArticle() {
	var width = 375;
	var height = 275;
	var url = "popup.save-article.html";
	var window_name = 'saveArticleWin';

	window.open(url, window_name, "width=" + width + ",height=" + height + ",toolbar=no,status=no,scrolling=no");
}


function editResearchGroups() {
	var width = 460;
	var height = 430;
	var url = "popup.edit-research-group.html";
	var window_name = 'editResearchWin';

	window.open(url, window_name, "width=" + width + ",height=" + height + ",toolbar=no,status=no,scrolling=no");
}



function toggleSearchingIndex(el) {
	var results_list = document.getElementById(CONTENT);
	var all_items = results_list.getElementsByTagName('div');

	for (var i=0; i < all_items.length; i++) {
		if (all_items[i].id == 'groups') all_items[i].style.display = 'none';
		if (all_items[i].className == SEARCHING_CLASS) all_items[i].style.display = 'block' ;
	}
} // END: toggleSearching()




///////BEGIN: ADVANCED SEARCH SPECIFIC FUNCTIONS//////////////////
	//Used to update the forms on the search page
	function updateSrcs(srcName){
	
		var all_items = document.getElementsByTagName('input');

		for (var i=0; i < all_items.length; i++) {

			if (all_items[i].id == srcName.id){
				if (all_items[i].type == "checkbox") {
					//get all the labels associated with the checkbox
					var label_items = document.getElementsByName(all_items[i].id+'_label');
					if (srcName.checked){
						all_items[i].checked = true;
						//change the labels to red and bold
						for (var x=0; x < label_items.length; x++) {
							//MTK 1/3/06 Removed bold red source types.
							//label_items[x].style.color = "#C00";  //red 
							//label_items[x].style.fontWeight = "bold";
							label_items[x].style.color = "#000";  //black
							label_items[x].style.fontWeight = "normal";
						}
					}else{
						all_items[i].checked = false;
						//change the labels to black and non-bold
						for (var x=0; x < label_items.length; x++) {
							label_items[x].style.color = "#000";  //black
							label_items[x].style.fontWeight = "normal";
						}
					}
				}else{
					if (srcName.checked){
						all_items[i].value = "on";
						//alert("on");
					}else{
						all_items[i].value = "off";
						//alert("off");
					}
				}
			}
		}	
	}//end updateSrcs()
	
	///////////////////////////////////////////////////////////////////////////
	function updateShowAdv(thisCheck){
		var all_items = document.getElementsByTagName('input');

		for (var i=0; i < all_items.length; i++) {

			if (all_items[i].id == thisCheck.id){
				if (all_items[i].type == "checkbox") {
					if (thisCheck.checked){
						all_items[i].checked = true;
					}else{
						all_items[i].checked = false;
					}
			
				}
			}
		}	
	}//end updateSrcs()	

	///////////////////////////////////////////////////////////////////////////
	function toggleSearchForm(onName) {
		var results_list = document.getElementById('searchHeader');
		var all_items = results_list.getElementsByTagName('div');
		var offName;
		
		if (onName == 'advancedform'){
			offName = 'simpleform';
		}
		else{
			offName = 'advancedform';
		}

		for (var i=0; i < all_items.length; i++) {
			if (all_items[i].id == offName){
				all_items[i].style.display = 'none';								
			}
			
			if (all_items[i].id == onName){
				all_items[i].style.display = 'block';							
			}
		}
	} // END: toggleSearchForm()
	///////////////////////////////////////////////////////////////////////////
	function toggleAdvancedOptions() {
		var results_list = document.getElementById('advancedform');
		var all_items = results_list.getElementsByTagName('div');

		for (var i=0; i < all_items.length; i++) {
			if (all_items[i].id == 'advOpt'){

				if (all_items[i].style.display == 'block'){
					all_items[i].style.display = 'none';

				}
				else{
					all_items[i].style.display = 'block';
				}
			}
		}
	} // END: toggleSearchForm()
	
	
	////////////////BEGIN: USED ON SEARCH.ASP FOR ADVANCED SEARCH FEATURES//////////////////
	
	// This function returns the current search form (either the normal or the advanced one).
	function getSearchForm() {
		if (document.subToggle.whichform.value == "searchForm"){
			return document.searchForm;
		}else{
			return document.advancedSearchForm;
		}
	}
	
	
	function submitadvanced(freePremium){
			var inputElem = document.createElement("input");
			inputElem.setAttribute("type","hidden");
			inputElem.setAttribute("name","FreePremium");
			inputElem.setAttribute("value",freePremium);
			if (document.subToggle.whichform.value == "searchForm"){
				document.searchForm.appendChild(inputElem)
				document.searchForm.submit();
			}else{
				updatePubsHidden(document.advancedSearchForm, document.advancedSearchForm.myList, document.advancedSearchForm.search_publication);
				document.advancedSearchForm.appendChild(inputElem)
				document.advancedSearchForm.submit();
			}
	}

	function toggleSubToggle(){
		var thisForm = document.subToggle.whichform;
		if (thisForm.value == "searchForm"){
			thisForm.value = "advancedSearchForm";
		}else{
			thisForm.value = "searchForm";
		}
	}	
	
	////////////////////////////////////////////////////////
	function clearEmptyOptions(thisForm){
		for (n=0; n < thisForm.options.length; n++) {
			if (thisForm.options[n].value == ""){
				thisForm.options[n] = null;
			}		
		}	
	}
	
	////////////////////////////////////////////////////////
	function sourcesToPop(thisForm){

		var theList;
		theList = "";
		clearEmptyOptions(thisForm);
		for (n=0; n < thisForm.options.length; n++) {
			theList = theList + escape(thisForm.options[n].text) + "|||";
		}
		return theList;
	}

	////////////////////////////////////////////////////////
	function openViewSrcs(thisForm, cntrlInfo){

		//convert list of sources into string for the popup
		var theList;
		theList = sourcesToPop(thisForm);

		//open window with the list attached in the querystring
		var SrcWin = window.open('/library/viewsrcs.asp?' + cntrlInfo + '&source=news&kp=' + theList,'ViewPublications','toolbar=no,resizable=yes,status=no,scrollbars=yes,width=700,height=500');

		SrcWin.focus();
	}
	
	////////////////////////////////////////////////////////
	
	
	function updatePubsHidden(thisForm, thisList, thisHidden){
		var savestr;
		savestr = "";
		clearEmptyOptions(thisList);

		for (i=0; i<thisList.options.length; i++) {
			if (i==thisList.options.length - 1){
				savestr += thisList.options[i].text;
			}else{
				savestr += thisList.options[i].text + "|||";
			}
		}

		thisHidden.value = savestr;
	}	
	
	////////////////////////////////////////////////////////////////////////////////
	function wipeListbox(thisBox){
		for (i = thisBox.options.length - 1; i >= 0; i--) {
			thisBox.options[i] = null;
		}
	}
	
	
	////////////////////////////////////////////////////////////////////////////////
	function wipeSingles(thisBox){
		for (i=thisBox.options.length - 1; i>=0; i--) {
			if (thisBox.options[i].selected == true){
				thisBox.options[i] = null;
			}
		}
	}
	
	
	/////////////////////////////////////////////////////////////////
	function updateMylist(thisList, thistext, thisval){
		var q;
		var thisText;
		var thisVal;
		q = thisList.length;
		thisText = new Option(thistext, thisval);
		try
		{
			thisList.options[q] = thisText;
		}
		catch(exception){
				alert("Error is " + exception.message)
				alert("Error is |" + exception.description + "|");
		}
	}	
	

	
	
///////END: ADVANCED SEARCH SPECIFIC FUNCTIONS//////////////////	


/////////////////////////////////////////////////////////////////////////////////////
	//trim functions
	function LTrim(str)
	{
	   var whitespace = new String(" \t\n\r");
	   var s = new String(str);

	   if (whitespace.indexOf(s.charAt(0)) != -1) {
	      var j=0, i = s.length;

	      while (j < i && whitespace.indexOf(s.charAt(j)) != -1)
	         j++;

	      s = s.substring(j, i);
	   }
	   return s;
	}


	function RTrim(str)
	{
	   var whitespace = new String(" \t\n\r");

	   var s = new String(str);

	   if (whitespace.indexOf(s.charAt(s.length-1)) != -1) {

	      var i = s.length - 1;

	      while (i >= 0 && whitespace.indexOf(s.charAt(i)) != -1)
	         i--;

	      s = s.substring(0, i+1);
	   }

	   return s;
	}

	function Trim(str)

	{
	   return RTrim(LTrim(str));
	}

	/////////////////////////////////////////////////////////////////////////////////////


	/////////////////////////////////////////////////////////////////////////////////////
	//used by advanced search for dates
		function greyout(whichBox){
			whichBox.style.backgroundColor = "#EEEEEE";
			whichBox.disabled = true;
		}
	
		function greyin(whichBox){
			whichBox.style.backgroundColor = "#FFFFFF";
			whichBox.disabled = false;
		}
	
		function greytxt(){
			var thisel = document.getElementById("greyword");
	
			thisel.style.color = "#CCCCCC";
		}
	
		function blacktxt(){
			var thisel = document.getElementById("greyword");
			thisel.style.color = "";
		}
	
	
		function alterdate(datetype, dateone, datetwo) {
		   var CurrentDate = new Date();
		   var CurrentMonth = CurrentDate.getMonth() + 1;
		   var CurrentYear = CurrentDate.getYear();
		   var CurrentDay = CurrentDate.getDate();
		   var MinusMonth;
		   var MinusYear;
	
		   var browser = navigator.appName;
		   var isokay = 1;
		   if (browser.indexOf("Netscape") != -1) {
			  var version = navigator.appVersion;
			  version=version.substring(0,2);
			  if (version < 3.0) {
				 isokay = 0;
			  }
		   }
	
	
	
		   if (isokay == 1) {
			var WidgetValue = datetype.options[datetype.selectedIndex].value;	
			if (WidgetValue == "all")
				{
	
					 greyout(dateone);
					 greyout(datetwo);
					 greytxt();
	
				}
				else if ((WidgetValue == "matches") || (WidgetValue == "before") ||	(WidgetValue == "after")){
	
					greyin(dateone);
					greyout(datetwo);
					greytxt();
	
				}
				else{
	
					greyin(dateone);
					greyin(datetwo);
					blacktxt();
				}
	
	
		   }
	
	
		   if (isokay == 1) {
			  	
			  if ((WidgetValue == "matches") ||
			  (WidgetValue == "before") ||
			  (WidgetValue == "after"))
			  {
			  	if (dateone.value == ""){
					 dateone.value = "MM/DD/YYYY";
				}
				 datetwo.value = "";
			  } else if (WidgetValue == "all") {
				datetwo.value = "";
				dateone.value = "";
	
			  } else if (WidgetValue == "between") {
			  	if (dateone.value == ""){
					dateone.value = "MM/DD/YYYY";
				}
				if (datetwo.value == ""){
					datetwo.value = "MM/DD/YYYY";
				}
	
			  } else {
	
			 if (CurrentYear < 200) {
				CurrentYear += 1900;
			 }
	
			 datetwo.value = CurrentMonth + "/" + CurrentDay + "/" + CurrentYear;
	
			 MinusMonth = WidgetValue % 12;
			 MinusYear = (WidgetValue - MinusMonth) / 12;
			 if (CurrentMonth <= MinusMonth) {
				MinusMonth -= 12;
				MinusYear += 1;
			 }
			 CurrentMonth -= MinusMonth;
			 CurrentYear -= MinusYear;
	
			 if (CurrentDay > 28) {
				if (CurrentMonth == 2) {
				  if ((CurrentYear % 400) == 0) {
				CurrentDay = 29;
				  } else if ((CurrentYear % 100) == 0) {
				CurrentDay = 28;
				  } else if ((CurrentYear % 4) == 0) {
				CurrentDay = 29;
				  } else {
				CurrentDay = 28;
				  }
				} else if ((CurrentDay > 30) &&
					   ((CurrentMonth == 4) || (CurrentMonth == 6) ||
					(CurrentMonth == 9) || (CurrentMonth == 11)))
				{
				   CurrentDay = 30;
				}
			 }
	
			 dateone.value = CurrentMonth + "/" + CurrentDay + "/" + CurrentYear;
			  }
		   }
	}



	/////////////////////////////////////////////////////////////////////////////////////
	//END: used by advanced search for dates