function showUpdating(whichLayer){
   		var elem;
   		var vis;
  		if( document.getElementById ) // this is the way the standards work
   			elem = document.getElementById( whichLayer );
 		else if( document.all ) // this is the way old msie versions work
     			elem = document.all[whichLayer];
 		else if( document.layers ) // this is the way nn4 works
   			elem = document.layers[whichLayer];
   		vis = elem.style;
 		vis.display = 'block';
   	}
    
    	function hideUpdating(whichLayer){
   		var elem;
   		var vis;
   		if( document.getElementById ) // this is the way the standards work
    			elem = document.getElementById( whichLayer );
  		else if( document.all ) // this is the way old msie versions work
      			elem = document.all[whichLayer];
  		else if( document.layers ) // this is the way nn4 works
    			elem = document.layers[whichLayer];
    		vis = elem.style;
  		vis.display = 'none';
  		if(wxAjax.getPopLock())
  			wxAjax.setPopLock(false);
    	}  
    
   	function clearQueryField() {
		if (document.getElementById('goodzip').value == "Zip Code or City") {
	  		document.getElementById('goodzip').value = "";
     		}
   	}

    	function fillQueryField() {
     		if (document.getElementById('goodzip').value == "") {
				document.getElementById('goodzip').value = "Zip Code or City";
     		}
   	}

   	function resetQueryField() {
			document.getElementById('goodzip').value = "Zip Code or City";
			document.getElementById('wthrChangeCityButton').focus();
   	}
   
	function swapNodes(node1, node2) {
		var itemtmp = node1.cloneNode(1);
		var parent = node1.parentNode;
		node2 = parent.replaceChild(itemtmp, node2);
		parent.replaceChild(node2, node1);
		parent.replaceChild(node1,itemtmp);
		itemtmp = null;
   	}

	function moveUp(_userId, moduleId, modDiv) {
		if(wxAjax.getButtonLock()){
  			showUpdating('weatherUpdating');
  			return;
 		}
		var elem = document.getElementById(modDiv);
		var elemParent = elem.parentNode;
		var parentDiv = elemParent.parentNode;
		var modulePosition = parseInt(elemParent.id.substring('weatherModule'.length));
		if (modulePosition > 1) {
			wxAjax.setButtonLock(true);
			var swapIndex = modulePosition - 1;
			var swapDivId = 'weatherModule' + swapIndex.toString();
	 		var toSwap = document.getElementById(swapDivId);
			toSwap.setAttribute('id', elemParent.id);
			elemParent.setAttribute('id', swapDivId);
			swapNodes(elemParent, toSwap);	
			WeatherAjax.moveUp(_userId, moduleId, dwrCallback);
  		}
	}
   	
   	function moveDown(_userId, moduleId, modDiv){
  		if(wxAjax.getButtonLock()){
  			showUpdating('weatherUpdating');
  			return;
  		}
  		var elem = document.getElementById(modDiv);
  		var elemParent = elem.parentNode;
  		var parentId = elemParent.id;
  		var modulePosition = parentId.substring('weatherModule'.length);
  		if (modulePosition < wxAjax.getModuleCount()){
  			wxAjax.setButtonLock(true);
    			var swapIndex = ++modulePosition;
    			var divName2 = 'weatherModule' + swapIndex.toString();
           		var toSwap = document.getElementById(divName2);
			elemParent.setAttribute('id', divName2);
			toSwap.setAttribute('id', parentId);
			swapNodes(toSwap, elemParent);
			WeatherAjax.moveDown(_userId, moduleId, dwrCallback);
		}
	}

	function dwrCallback(){
		if(wxAjax.getButtonLock()){
			wxAjax.setButtonLock(false);
			hideUpdating('weatherUpdating');
		}
	}

	function removeMod(_userId, moduleId, modDiv){
		if(wxAjax.getButtonLock()){
   			showUpdating('weatherUpdating');
   			return;
   		}
   		wxAjax.setButtonLock(true); 
		WeatherAjax.removeModule(_userId, moduleId, handleRemoveModules);
		newCount = wxAjax.getModuleCount() - 1;
		wxAjax.setModuleCount(newCount);
	}
	
	function handleRemoveModules(str) {
	    WeatherAjax.refreshModules(wxAjax.userId, wxAjax.getCurrentZip(), wxAjax.siteName, wxAjax.siteURL, handleRefreshModules);
	}
	
	function addModules(_userId) {	
		var myForm = document.getElementById('addmodules');
		var inputs = myForm.getElementsByTagName('input');
		var moduleArr = new Array();
		for (var i = 0; i < inputs.length; i++){
			if (inputs[i].checked){
				var inId = inputs[i].name;
				var index = inId.indexOf("_");
				index++;
			    inId = inId.substring(index);
				moduleArr.push(inId);
			}
			if(inputs[i].name == 'newZip'){
 				var newZip = inputs[i].value;
 				if(newZip.length > 0) {
 					if(!validateZipFromOverlay()){
 						alert('Please enter a 5 digit zip code only');
 						return false;
 					}
 					wxAjax.setCurrentZip(newZip);
 					updatePrimaryZip(_userId, newZip);
 				}
 			}
		}
		wxAjax.setPopLock(true);
		WeatherAjax.addModules(_userId, moduleArr, wxAjax.getCurrentZip(), wxAjax.siteName, wxAjax.siteURL, handleAddModules);
		hideUpdating('newWeatherOverlay');
	}
	
	function updatePrimaryZip(_userId, zipCode){
 	    wxAjax.setPopLock(true);
 	  	WeatherAjax.updatePrimaryZipCode(_userId, zipCode);
 	  	
 	  	WeatherAjax.getWeather(zipCode, wxAjax.siteName, wxAjax.siteURL, handleGetWeather);
	}
	
	function handleAddModules(str) {
	    WeatherAjax.refreshModules(wxAjax.userId, wxAjax.getCurrentZip(), wxAjax.siteName, wxAjax.siteURL, handleRefreshModules);
	}
	
	function validateZip() {
  		var value = document.getElementById('goodzip').value;
  		if (value.length == 5 && value.match(/^\d+$/)) {
  			return true;
  		} else if (value.match(/[a-z,A-Z]+, *[a-z,A-Z]/)) {
  			return true;
  		}
  		return false;
  	}
  	
	function getWeather(siteName, siteURL) {	
		if (!validateZip()){
	    		alert("Please enter a 5 digit zip code or a city name followed by a comma and state abbreviation.");
	    		return;
	  	}
		wxAjax.setPopLock(true);
	  	var cityZip = document.getElementById('goodzip').value;
	  	WeatherAjax.getWeather(cityZip, wxAjax.siteName, wxAjax.siteURL, handleGetWeather);
	  	resetQueryField();
	}
	
	function handleRefreshModules(str) {
		var jsonObj = str.evalJSON();
	  	var moduleLength = jsonObj.length;
	  	wxAjax.setModuleCount(moduleLength);
	  	for(i = 1; i <= wxAjax.totalDivCount; i++) {
			divName = 'weatherModule' + i.toString();
			curMod = document.getElementById(divName);
			Element.extend(curMod);
	  		if (i <= moduleLength) {
			  	var module = jsonObj[i - 1];
		  		curMod.update(module);
			 } else {				
		  		curMod.update(''); 
			 }
	  	}
	  	wxAjax.setPopLock(false);
	  	dwrCallback();
	}
	
	function handleGetWeather(str) {
		var jsonObj = str.evalJSON();
		var weatherErr = jsonObj.error;
		var weatherAlert = jsonObj.alert;
		var weatherTable = jsonObj.tabledata;
		var weatherZip = jsonObj.zip_code;
		var weatherCity = jsonObj.city;
		var radarURL = jsonObj.radar;
		wxAjax.setCurrentZip(weatherZip);
		var city = document.getElementById('_cityname');
		Element.extend(city);
		var tbl = document.getElementById('tableData');
		Element.extend(tbl);
		var alerts = document.getElementById('wthrBreakingAlert');
		Element.extend(alerts);
		if(weatherErr.length > 0){
			city.update(weatherErr);
			tbl.update('');
			alerts.update('');
			alerts.hide();
		} else {
			city.update('<h2>' + weatherCity  + '</h2>');
                	var radar = document.getElementById('wthrMapImage');
                	Element.extend(radar);
			alerts.update(weatherAlert);
			if(weatherAlert.length > 0){
				alerts.show();
			} else {
				alerts.hide();
			}
			tbl.update(weatherTable);
			dynamicCity = weatherCity;
			dynamicDisp = radarURL;
			doRadarTab();
			radar.update('<img id="wthrMapImageTag" name="wthrMapImageTag" src="' + radarURL + '">');
		}
		WeatherAjax.refreshModules(wxAjax.userId, wxAjax.getCurrentZip(), wxAjax.siteName, wxAjax.siteURL, handleRefreshModules);
	}
	
	function getOverlayHTML(_userId) {
		if (wxAjax.getPopLock()) {
	    	return;
	  	}
	  	WeatherAjax.getOverlayHTML(_userId, handleGetOverlay);
	}
	
	function handleGetOverlay(str) {
		var overlay = document.getElementById('newWeatherOverlay');
		Element.extend(overlay);
		var checkBoxes = document.getElementById('moduleCheckboxes');
		Element.extend(checkBoxes);
		checkBoxes.update(str);
		Element.show(overlay);
		wxAjax.setPopLock(true);
	}
	
	function checkEnter(e){ //e is event object passed from function invocation
		var characterCode; //literal character code will be stored in this variable
		if(e && e.which) { //if which property of event object is supported (NN4)
			characterCode = e.which; //character code is contained in NN4's which property
		} else {
			characterCode = e.keyCode; //character code is contained in IE's keyCode property
		}
		if(characterCode == 13 || characterCode == 3){ //if generated character code is equal to ascii 13 (if enter key)
			getWeather(wxAjax.sitename, wxAjax.siteURL);
			resetQueryField();
			return false;
		} else {
			return true;
		}
	}
	
	function checkOverLayEnter(e){ //e is event object passed from function invocation
		var characterCode; //literal character code will be stored in this variable
		if(e && e.which) { //if which property of event object is supported (NN4)
			characterCode = e.which; //character code is contained in NN4's which property
		} else {
			characterCode = e.keyCode; //character code is contained in IE's keyCode property
		}
		if(characterCode == 13 || characterCode == 3){ //if generated character code is equal to ascii 13 (if enter key)
			addModules(wxAjax.userId);
			hideUpdating('newWeatherOverlay');
			return false;
		} else {
			return true;
		}
	}
	
	function validateZipFromOverlay() {
  		var value = document.getElementById('newZip').value;
  		if (value.length == 5 && value.match(/^\d+$/)) {
  			return true;
  		} else { 
  			return false;
  		}
  	}

	function getURLogin(){
		var login =  wxAjax.getDestURL() + URLEncode(window.location.pathname);
		document.location.href=login;
	}

	function URLEncode(toEncode ){
		var SAFECHARS = "0123456789" +	// Numeric
		"ABCDEFGHIJKLMNOPQRSTUVWXYZ" +	// Alphabetic
		"abcdefghijklmnopqrstuvwxyz" +
		"-_.!~*'()";			// RFC2396 Mark characters
		var HEX = "0123456789ABCDEF";

		var plaintext = toEncode;
		var encoded = "";
		for (var i = 0; i < plaintext.length; i++ ) {
			var ch = plaintext.charAt(i);
		    if (ch == " ") {
			    encoded += "+";
			} else if (SAFECHARS.indexOf(ch) != -1) {
			    encoded += ch;
			} else {
			    var charCode = ch.charCodeAt(0);
			    if (charCode > 255) {
				    alert( "Unicode Character '" 
                        	+ ch 
                        	+ "' cannot be encoded using standard URL encoding.\n" +
				          "(URL encoding only supports 8-bit characters.)\n" +
						  "A space (+) will be substituted." );
				encoded += "+";
			    } else {
					encoded += "%";
					encoded += HEX.charAt((charCode >> 4) & 0xF);
					encoded += HEX.charAt(charCode & 0xF);
			    }
			}
		} // for
		return encoded;
	}

	function fixTimes(){
			var spanTag;
			if(document.getElementById('wthrDaylightBody')){
				var daylight = document.getElementById('wthrDaylightBody');
				var divArray = daylight.getElementsByTagName('span');
				for (var i = 0; i < divArray.length; i++){
					if(i == 1 || i == 3){
						spanTag = divArray[i];
						Element.extend(spanTag);
						var wrongTime = spanTag.innerHTML.toString();
						var rightTime = wrongTime.replace(/AM/, "PM");
						spanTag.update(rightTime);
					}	
				}
			}
	}