function hidecontactblock(hideID1, hideID2) {
    document.getElementById(hideID1).style.display = 'none';
    document.getElementById(hideID1).style.visibility = 'hidden';
    document.getElementById(hideID2).style.display = 'block';
    document.getElementById(hideID2).style.visibility = 'visible';
}
function validate() {
    var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
    var address = document.getElementById('email').value;
    if (reg.test(address) === false) {
        alert('Invalid Email Address');
        return false;
    }
    else {
        return true;
    }
}
function doSend()
{   
    var fname=document.getElementById('fname').value;    
    var lname=document.getElementById('lname').value;
    var email=document.getElementById('email').value;
    var msg=document.getElementById('msg').value;    
    var xmlhttp;
    if (window.XMLHttpRequest)
    {
        // code for IE7+, Firefox, Chrome, Opera, Safari
        xmlhttp=new XMLHttpRequest();
    }
    else if (window.ActiveXObject)
    {
        // code for IE6, IE5
        xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
    else
    {
        alert("Your browser does not support XMLHTTP!");
    }
    xmlhttp.onreadystatechange = function() {
        if (xmlhttp.readyState == 4) {
            document.getElementById('fname').value = "";
            document.getElementById('lname').value = "";
            document.getElementById('email').value = "";
            document.getElementById('msg').value = "";
            hidecontactblock('span1', 'span2');
        }
    };    
    if(fname=="" || lname=="" || email=="" || msg=="")
    {
        alert("Enter the required fields");
    }
    else
    {
        var check=validate();
        if(check)
        {
            var url="Contact.aspx?fname="+fname+"&lname="+lname+"&email="+email+"&msg="+msg+"";    
            xmlhttp.open("POST",url,true);
            xmlhttp.send(null);
        }
    }
}
function doCancel()
{ 
   document.getElementById('fname').value = "";
   document.getElementById('lname').value = ""; 
   document.getElementById('email').value = ""; 
   document.getElementById('msg').value = "";     
}