function submitEmail(){

    xmlhttp=GetXmlHttpObject();if(xmlhttp==null){alert("Browser is not supported!");return;}
	var y=document.getElementById('submitEmail').value;
	var url="surveys/presurvey.php?emailMe="+y;
	xmlhttp.onreadystatechange=okOnTheEmail;
	xmlhttp.open("GET",url,true);
	xmlhttp.send(null);}

function okOnTheEmail(){
    if(xmlhttp.readyState==4){
    document.getElementById("submitEmailButton").value=xmlhttp.responseText;
    document.getElementById("submitEmailButton").disabled=true;
    document.getElementById("submitEmail").value='';
    document.getElementById("submitEmail").disabled=true;}}