var inProcess = 0;
	var hideID = 0;
	var menus = new Array();
	menus['drop'] = 3;
	menus['sub'] = 9;
	var delay = 3000;
	var secNav = 0;
	var tertNav = 0;

  function gotoURL(site) {
    if (site)
    {
      window.location = site;
    }
  }
  
	function reveal(what) {
		if (document.getElementById(what) != undefined) {
			for (var i=1; i<secNav; i++) {
				var tempid = 'secNav_' + i;
				if (document.getElementById(tempid) != undefined && tempid != what) document.getElementById(tempid).style.display = 'none';
			}
			elem = document.getElementById(what);
			if (elem.style.display == 'none') elem.style.display = 'block';
			else elem.style.display = 'none';
		}
	}
	function hide(what) {
		document.getElementById(what).style.display = 'none';
	}
	function showMenu(what,which,caller) {
		clearTimeout(hideID);
		hideID = 0;
		for (var i=0; i<=menus[what];i++) {
			if (i != which) hideMenu(what,i);
		}
		if (what == 'drop') {
			for (var i=0; i<=menus['sub'];i++) hideMenu('sub',i);
		}
		else if (what == 'sub') {
			caller.style.background = 'url(' + sitehome + 'assets/images/dropMenuOn.gif) no-repeat top left';
			caller.style.color = 'white';
			caller.style.fontWeight = 'bold';
		}
		else {
			caller.style.background = 'url(' + sitehome + 'assets/images/subMenuOn.gif) no-repeat top left';
			caller.style.color = 'white';
			caller.style.fontWeight = 'bold';
		}
		var elem = what + 'Menu' + which;
		if (document.getElementById(elem) != undefined) {
			var drop = document.getElementById(elem);
			drop.style.visibility = '';
		}
	}
	function hideMenu(what,which) {
		var elem = what + 'Menu' + which;
		if (document.getElementById(elem) != undefined) {
			var drop = document.getElementById(elem);
			drop.style.visibility = 'hidden';
		}
	}
	function hideMenus() {
		for (var i=0; i<=menus['sub'];i++) hideMenu('sub',i);
		for (var i=0; i<=menus['drop'];i++) hideMenu('drop',i);
	}
	function waitAndHideMenu(what,which) {
		clearTimeout(hideID);
		hideID = 0;
		var func = "hideMenu('" + what + "'," + which + ")";
		hideID = setTimeout(func,delay);
	}
	function waitAndHideMenus(type,img,caller) {
		if (type == 'drop') {
			caller.style.background = 'url(' + sitehome + 'assets/images/' + img + '.gif) no-repeat top left';
			caller.style.color = '#54707E';
			caller.style.fontWeight = '';
		}
		else if (type == 'sub' ) {
			caller.style.background = 'url(' + sitehome + 'assets/images/' + img + '.gif) no-repeat top left';
			caller.style.color = '#54707E';
			caller.style.fontWeight = '';
		}
		clearTimeout(hideID);
		hideID = 0;
		var func = "hideMenus()";
		hideID = setTimeout(func,delay);
	}

	function goToIt() {  }
	
	function loadXMLDoc(url,towhat,meth,postwhat) 
	{
	    var thefunc = towhat;
	    var sRand=(url.indexOf('?')==-1?'?':'&')+'Rand='+Math.random();
	    var req;
	    try { 
		req = new ActiveXObject("Microsoft.XMLHTTP");
	    } catch(E) {
		if (typeof XMLHttpRequest != 'undefined') {
			try {
				 req = new XMLHttpRequest();
			} catch (e) {
				req = false;
			}
		}
		else req = false;
	    } 
	    if (req) {
			inProcess++;
	        req.open(meth, url, true);
			req.onreadystatechange = processReqChange;
			if (meth == "POST") {
				req.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
			}
			req.setRequestHeader('If-Modified-Since','Sat, 13 Dec 1975 00:00:00 GMT');
			req.send(postwhat);
	    }

		function goToIt() {  }
	
	    function processReqChange() {
		   	 if (req.readyState == 4) {
			    try {
		        	if (req.status == 200) {
						inProcess--;
				   		if (thefunc != undefined && thefunc != "") eval(thefunc);		
		        	} else {
		            		alert('Had some trouble here:\nError: ' + req.statusText);
		        	}
			    } catch(e) { goToIt(); }
		    }
		}
		function loadPage() {
			var response = req.responseXML.documentElement;
			var thepage = response.getElementsByTagName('thepage')[0].firstChild.data;
			var thescript = response.getElementsByTagName('thescript')[0].firstChild.data;
			var openNode = response.getElementsByTagName('openNode')[0].firstChild.data;
			document.getElementById("ContentDiv").innerHTML = thepage;var content_div_inner = response.getElementsByTagName('content_div')[0].firstChild.data;
document.getElementById('content_div').innerHTML = content_div_inner;
			if (thescript != '')
			{
				eval(thescript);
				document.getElementById("tree").innerHTML = HHMI;
			}
			if (openNode != '')
			{
				for (var i=0;i<HHMI.aNodes.length;i++)
				{
					if (HHMI.aNodes[i].name == openNode) {
						updateContent(i);
						break;
					}
				}
			}
			else  {
				HHMI.openAll();
			}
		}
		
		function loadPageOnce(node) {
			var response = req.responseXML.documentElement;
			var thepage = response.getElementsByTagName('thepage')[0].firstChild.data;
			var thescript = response.getElementsByTagName('thescript')[0].firstChild.data;
			var openNode = response.getElementsByTagName('openNode')[0].firstChild.data;
			document.getElementById("ContentDiv").innerHTML = thepage;var content_div_inner = response.getElementsByTagName('content_div')[0].firstChild.data;
document.getElementById('content_div').innerHTML = content_div_inner;
			if (thescript != '')
			{
				eval(thescript);
				document.getElementById("tree").innerHTML = HHMI;
			}
			if (node > 0) 
			{
				HHMI.openTo(node);
				HHMI.s(node);
			}
			else
			{
				HHMI.openAll();
				HHMI.s(0);
			}
		}			
	}

		
	var sitehome = "http://interfaces.ucsd.edu/";
	var courseNav = '';
	function showCourseNav(obj,e,what,theid) {
  		var tempX = 0;
  		var tempY = 0;
  		var offset = 0;
  		var objHolder = obj;

		obj = document.getElementById( obj );
  		if (obj==null) return;

  		if (document.all) {
    			tempX = event.clientX + document.body.scrollLeft;
    			tempY = event.clientY + document.body.scrollTop;
  		} else {
    			tempX = e.pageX;
    			tempY = e.pageY;
  		}
  		if (tempX < 0){tempX = 0}
  		if (tempY < 0){tempY = 0}
		obj.style.top  = (tempY + offset) + 'px';
  		obj.style.left = (tempX + offset) + 'px';
		
		obj.innerHTML = courseNav;
		var show = obj.style.display;
		if (show == undefined || show == '') show = 'none'; 
  		obj.style.display = show ? 'block' : 'none';
  		obj.style.visibility = show ? 'visible' : 'hidden';
	}

        zHigh = 9999;
        function showBreadLoaf(e,cid) {
                var divname = 'breadLoaf' + cid;
                obj = document.getElementById(divname);
                if (obj==null) return;
                if (obj.style.display != 'block') {
                        var tempX = 0;
                        var tempY = 0;
                        var offsetX = -6;
         var offsetY = -6;

                        if (document.all) {
                                        tempX = event.clientX + document.body.scrollLeft;
                                        tempY = event.clientY + document.body.scrollTop;
                        } else {
                                        tempX = e.pageX;
                                        tempY = e.pageY;
                        }
         if (tempX < 0){tempX = 0}
                        if (tempY < 0){tempY = 0}
                        obj.style.top  = (tempY + offsetY) + 'px';
                        obj.style.left = (tempX + offsetX) + 'px';
         obj.style.zIndex = zHigh + 1;
                        obj.style.display = 'block';
                        obj.style.visibility = 'visible';
                }
        }
   function keepBreadLoaf(cid) {
      var divname = 'breadLoaf' + cid;
                obj = document.getElementById(divname);
                if (obj==null) return;
                obj.style.display = 'block';
                obj.style.visibility = 'visible';
        }
        function closeBreadLoaf(cid) {
                var divname = 'breadLoaf' + cid;
                obj = document.getElementById(divname);
                if (obj==null) return;
                obj.style.display = 'none';
                obj.style.visibility = 'hidden';
        }