var frm;
function checkDuplicate(frm, table, objField, objId, objMode)
{	
	var PostParam = "";
	var ext_where_param = '';
	form = frm;
	with(frm)
	{
		if(frm.vEmail1)
			var Field_val = frm.vEmail1.value;
		else if(frm.UpdateEmail)
			var Field_val = frm.UpdateEmail.value;
		else
			var Field_val = frm.vEmail.value;
		var Id_val = document.getElementById(objId).value;
	}

	PostParam = "table="+table+"&mode="+objMode+"&Field_val="+Field_val+"&Id_val="+Id_val+"&Field="+objField+"&Id="+objId;
	PostParam = PostParam  + ext_where_param;
	var url = "checkDuplicateRecord.php?";
	var contentType = "application/x-www-form-urlencoded; charset=UTF-8";
	var params = PostParam;
  	url = url+PostParam;
	if (window.XMLHttpRequest) 
	{
        http = new XMLHttpRequest();
        http.onreadystatechange = handleHttpResponse_status;
		http.open("post", url, true);
        http.setRequestHeader("Content-Type", contentType);
        http.send(params);
        status = true;
		// ActiveX XMLHttpRequest object
    } 
	else if (window.ActiveXObject) 
	{
        http = new ActiveXObject("Microsoft.XMLHTTP");
        if (http) 
		{
            http.onreadystatechange = handleHttpResponse_status;
            http.open("post", url, true);
            http.setRequestHeader("Content-Type", contentType);
			http.send(params);
            status = true;
        }
    }
}
function handleHttpResponse_status() 
{ 
	if (http.readyState == 4) 
	{	
      	isWorking = false;
    	if (http.responseText.indexOf('invalid') == -1) 
		{
    		var xmlDocument = http.responseXML; 
			var existId = xmlDocument.getElementsByTagName('exist').item(0).firstChild.data;
			var field = xmlDocument.getElementsByTagName('field').item(0).firstChild.data;
			if(existId == '1')
			{
				alert("Oops! This Email Id is already Registered with us! Please use Different Email Id");	
				return false;
			}
			else
			{
				form.submit();
			}
		}
	}	
}