image1 = new Image();
image1.src = "/images/ajax-loader.gif";
var xmlHttp



function emailInput()
{
	if(document.getElementById("Email").value == '<email>')
		document.getElementById("Email").value = '';
}

function emailOnLeave()
{
	if(document.getElementById("Email").value.length == 0)
		document.getElementById("Email").value = '<email>';
}

function onclickSubmit()
{
	var regExp = /^[a-zA-Z][\w\.-]*[a-zA-Z0-9]@[a-zA-Z0-9][\w\.-]*[a-zA-Z0-9]\.[a-zA-Z][a-zA-Z\.]*[a-zA-Z]$/;
	var email = document.getElementById("Email").value;
	
	if(email.search(regExp) == -1)
		alert('Please Enter a Valid Email Address.');
	else	
		submitEmail();
}



function submitEmail()
{
	addEmailAddressEconEdLink();
} 


function addEmailAddressEconEdLink( )
{
	var str = document.getElementById("Email").value;
 
	document.getElementById("emailContent").innerHTML='<p><center><img src="/images/ajax-loader.gif" width="150px" /></p><h2>Adding your email address...</h2></center>';

	if (str.length==0)
	{ 
		return;
	}
        
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null)
	{
		return;
	} 
	
	xmlHttp.onreadystatechange=stateChangedEconEdLink;
	xmlHttp.open("GET","/emailSignup.php?Email=" + str,true);
	xmlHttp.send(null);
}

function stateChangedEconEdLink() 
{ 
	var status;
    
	if (xmlHttp.readyState==4)
	{ 
    	status = xmlHttp.responseText;

        if(status.trim() == 'true')
        {
			document.getElementById("emailContent").innerHTML = '<h2>Thank you!</h2><p><b>Would you like to sign up to receive additional teaching resources from the Council for Economic Education?</b></p>';
        	document.getElementById("catalog_signup").style.visibility = "visible";
       	}
        
        else
        {
			document.getElementById("emailContent").innerHTML= '<p>Please enter a valid email address.</p><input name="Email" id="Email" value="<email>" onClick="emailInput();" onblur="emailOnLeave();" ><input type="button" value="Sign Up" class="button" onclick="onclickSubmit();" style="cursor:pointer;">';
        
        
        }    
    }
    
}

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;
}