sfHover = function() {
	var sfEls = document.getElementById("nav").getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);

function Subscribe(emailaddress)
{
    if(!isValidEmail(emailaddress))
    {   
        document.getElementById('divMessage').innerHTML = '<span style="color:blue">Email not valid.</span>';
        return;
    }    
 

    var xmlHttp;
    var url = "AjaxHandler.aspx?email=" + emailaddress;
    xmlHttp = getXMLHTTP();
	if (xmlHttp)
	{
		
		xmlHttp.onreadystatechange = doReadyStateChange;
		xmlHttp.open("GET", url, true);
		xmlHttp.send(null);
	}			
	function doReadyStateChange()
	{
		if (xmlHttp.readyState == 4)
		{
			if (xmlHttp.status == 200 && xmlHttp.responseText=="true")
			{
				
			    document.getElementById('txtEmailSubscribe').value = "";
                document.getElementById('divMessage').innerHTML = '<span style="color:#990100">Subscribed succesfully.</span>';					
			}
			else
			{
				document.getElementById('divMessage').innerHTML = '<span style="color:blue">Error!! Try again.</span>';
			}
		}			
	}
       
}


/****
Helper functions


***/
function isValidEmail(strEmail){
     var emailReg = "^[\\w-_\.]*[\\w-_\.]\@[\\w]\.+[\\w]+[\\w]$";
     var regex = new RegExp(emailReg);
     return regex.test(strEmail);
 
}

function getXMLHTTP()
{
	var A = null;
	try{
		A = new ActiveXObject("Msxml2.XMLHTTP");
	}
	catch(e){
		try{
			A = new ActiveXObject("Microsoft.XMLHTTP");
		} catch(oc){
			A = null;
		}
	}
	if(!A && typeof XMLHttpRequest != "undefined") {
		A = new XMLHttpRequest();
	}
	return A;
}