var xmlHttp

function submitEmail()
{

	var str = document.getElementById("Email").value;
    
	document.getElementById("emailContent").innerHTML='<center><img src="images/ajax-loader.gif" width="150px" /><br /><b>Adding your email address...</b></center>';

	if (str.length==0)
	{ 
		document.getElementById("emailContent").innerHTML="";
		return;
	}
    
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null)
	{
		alert ("Your browser does not support AJAX!");
		return;
	} 
	
	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("GET","emailSignup.php?Email=" + str,true);
	xmlHttp.send(null);
} 

function stateChanged() 
{ 
	var status;

	if (xmlHttp.readyState==4)
	{ 
		//document.getElementById("emailContent").innerHTML=xmlHttp.responseText;
        //document.getElementById("catalog_signup").style.visibility = "visible";


    	status = xmlHttp.responseText;
		//alert(status + " - " + status.length);
        if(status.trim() == 'true')
        {
			document.getElementById("emailContent").innerHTML = '<b>Thank you! You will receive an email when there is any CEE news.</b><br><br><b>Would you like to sign up to receive additional teaching resources from the CEE?</b><br>';
        	document.getElementById("catalog_signup").style.visibility = "visible";
       	}
        
        else
        {
			document.getElementById("emailContent").innerHTML= '<b>Please enter a valid email address.</b></dd></dl><input name="Email" id="Email" value="<email>" onClick="emailInput();" onblur="emailOnLeave();" ><input type="button" value="Sign Up" class="button" onclick="onclickSubmit();" style="cursor:pointer;">';
        
        
        }

	}
    
    //alert(xmlHttp.readyState);
}

function GetXmlHttpObject()
{
	var xmlHttp=null;
	try
	{
		// Firefox, Opera 8.0+, Safari
		xmlHttp=new XMLHttpRequest();
	}
	catch (e)
	{
		// Internet Explorer
		try
		{
			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e)
		{
			xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
		}
	}
	
    return xmlHttp;
}