function phonefind()
 {
    var makeid = document.getElementById('Makeddl').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() {
        var modeldd = document.getElementById('modeldd');
        if (xmlhttp.readyState < 4) {
            modeldd.innerHTML = "<img src='images/loadingAnimation.gif' alt='Processing.....'/>";
        }
        if (xmlhttp.readyState == 4) {
            var value = xmlhttp.responseText;
            var index = value.indexOf("<div");            
            if (index > 0) {
                value = value.substring(0, index);
                modeldd.innerHTML = value;
            }
            else {
                modeldd.innerHTML = value;
            }
        }
    };    
    if (makeid == "") {
        alert("Enter the required fields");
    }
    else {
        var url = "phonefinder.aspx?makeid=" + makeid + "";
            xmlhttp.open("POST", url, true);
            xmlhttp.send(null);
        }
}