function showPreview(){
		document.getElementById("preview").style.display = 'block';
		document.getElementById("hide_preview").style.display = 'block';
		document.getElementById("show_preview").style.display = 'none';
	}

    function saveTabs(tabStop){
		tabs = tabStop.getTabs();
		selTabs = "";
		for(var i=0;i<tabs.length;i++){
			selTabs += tabs[i].id + ";";
		}
		if(selTabs != "")
			selTabs = selTabs.substring(0, selTabs.length - 1);
		_setCookie("tabs", selTabs);
    }

	function hidePreview(full){
		document.getElementById("preview").style.display = 'none';
		document.getElementById("hide_preview").style.display = 'none';
        if(full)
			document.getElementById("show_preview").style.display = 'none';
		else
            document.getElementById("show_preview").style.display = 'block';
	}
	function closeTab (tabid){
		var tabObj = document.getElementById("tab" + tabid);
		if(tabObj != null){
			var selected = (tabObj.style.backgroundColor == 'white') ? true : false;
			tabObj.parentNode.removeChild(tabObj);
			tabStop.resizeTabs();
            if(tabStop.getTabs().length == 0)
            	hidePreview(true);
            else if(selected){
            	tabStop.setSelected(tabStop.getTabs()[0]);
            }
            saveTabs(tabStop);
			return true;
		}
		return false;
	}

	function addTab(linkObj){
		if(browser.IE && browser.version(1) <= 5 && browser.version(2) < 5)
			return true;
		if(HTTP_COOKIE_VARS["previewOff"] == "true")
		    return true;
		params = Vars.getVars(linkObj.href);
		tab = new Tab(params["xyurl"], linkObj.innerHTML);
		if(!Vars.defined("tabStop"))
			tabStop = new TabStop();
		if(tabStop.tabExist(tab)){
			tabStop.setSelected(tab);
		}
		else{
			tabStop.addTab(tab);
		}
		saveTabs(tabStop);
		showPreview();
		return false;
	}

	function addSavedTab(n, name){
		tab = new Tab(n, name);
		if(!Vars.defined("tabStop"))
			tabStop = new TabStop();
		if(tabStop.tabExist(tab))
			tabStop.setSelected(tab);
		else
			tabStop.addTab(tab);
		showPreview();
		return false;
	}

	function selectTab(tabid){
		var tObj = document.getElementById("tab" + tabid);
		if(tObj != null){
			tab = new Tab(tObj.getAttribute("tabid"), tObj.getAttribute("tabname"));
			tabStop.setSelected(tab);
		}
	}

	function showContent(tabid){
		divs = document.getElementsByTagName("div");
		for(var i=0;i<divs.length;i++){
			if(divs[i].getAttribute("contentdiv") == 1){
				if(divs[i].getAttribute("tabid") == tabid)
					divs[i].style.display = 'block';
				else
                    divs[i].style.display = 'none';
			}
		}
	}

	function Tab(ind, name){
        this.id = ind;
        this.eventName = name;
	}

	function disablePreview(){
        document.getElementById("preview").style.display = 'none';
        document.getElementById("hide_preview").style.display = 'none';
        document.getElementById("show_preview").style.display = 'none';
	}

	function changePreviewMode(check){
        _setCookie('previewOff', check);
        if(check){
            disablePreview();
		}
	}

	function TabStop(){
		this.obj = document.getElementById("tabstop");
		this.innerHTML = this.obj.innerHTML;
	}

	TabStop.prototype = {
		getTabs : function(){
			var res = Array();
			var tabObjs =  this.obj.getElementsByTagName("table");
			for(var i=0; i< tabObjs.length;i++){
                if(tabObjs[i].getAttribute("tabid") != "{TABID}"){
					var tab = new Tab(tabObjs[i].getAttribute("tabid"), tabObjs[i].getAttribute("tabname"));
					res[res.length] = tab
				}
			}
			return res;
		},
		resizeTabs : function(){
			var tabs = this.getTabs();
			var tabsize = 0;
			var namesize = 4;
            var selTabs = "";
			switch(tabs.length){
				case 4 :
					tabsize = "80";
					namesize = 7;
				break;
				case 3 :
					tabsize = "104";
					namesize = 10;
				break;
				case 2 :
					tabsize = "129";
					namesize = 15;
				break;
				case 1 :
					tabsize = "181";
					namesize = 22;
				break;
				default :
					return false;
				break;
			}
			var tdsize = tabsize - 19;
			for(var i=0;i<tabs.length;i++){
				var tObj = document.getElementById("tab"+tabs[i].id);
            	selTabs +=  tabs[i].id + ";";
				var tdObj = tObj.getElementsByTagName("td")[0];
				tObj.style.width = tabsize + "px";
    			tdObj.style.width = tdsize + "px";
    			var name = tObj.getAttribute("tabname").substring(0, namesize);
    			if (name.length < tObj.getAttribute("tabname").length){
    				name += "..";
    			}
    			tdObj.innerHTML = name;
			}
			if(selTabs != "")
				selTabs = selTabs.substring(0, selTabs.length - 1);
			return true;
		},
		addTab : function(tab){
			var tabs = this.getTabs();
			var tabsArray = new Array();
			tabsArray[0] = tab;
			for(var i=0; i<tabs.length;i++){
				if(i == 3)
					break;
				tabsArray[i+1] = tabs[i];
			}
			this.setContent(tabsArray);
			this.setSelected(tab);
		},
		setContent : function(tArr){
			var tabProto = document.getElementById("tab_prototype").innerHTML;
            var re1 = /\{NAME\}/g;
            var re2 = /\{TABID\}/g;
            this.innerHTML = "";
            for (var i=0; i<tArr.length; i++){
            	this.innerHTML += tabProto.replace(re1, tArr[i].eventName).replace(re2, tArr[i].id);
            }
            this.obj.innerHTML = this.innerHTML;
			this.resizeTabs();
		},
		setSelected : function(tab){
			this.refreshTabs();
			var tabObj = document.getElementById("tab" + tab.id);
			var trObj = tabObj.getElementsByTagName("tr")[0];
			tabObj.style.backgroundColor = "white";
    		trObj.style.backgroundColor = "white";
    		trImg = trObj.getElementsByTagName("img")[0];
    		trImg.src = "/chicago/images/search/ui_ne_tab.gif";
			showContent(tab.id);
		},
		refreshTabs : function() {
			this.setContent(this.getTabs());
		},
		tabExist  : function(tab){
			var tabs = this.getTabs();
			for(var i=0;i<tabs.length;i++){
				if(tab.id == tabs[i].id)
					return true;
			}
			return false;
		}
	}


	function hideEmptyFields(){
       var tables = document.getElementsByTagName("table");
       for(var i=0;i<tables.length;i++){
           if(tables[i].getAttribute("details") == "details_table"){
              var details_td = tables[i].getElementsByTagName("td");
              var re = /^<b>.+<\/b>$/i;
              for(var j=0;j<details_td.length;j++){
                  if((details_td[j].className == 'searchDetails' || details_td[j].className == 'searchDetails') && re.test(details_td[j].innerHTML)){
                      details_td[j].parentNode.style.display = 'none';
                  }
              }
           }
        }
	}