function load_PreCallBack() 
		
		{
			var loading = document.createElement("div");
			loading.id = "loading";
			loading.style.color = "black";
			loading.style.left = "50%";
			loading.style.top = "50%";
			loading.style.marginTop = "-16px";
			loading.style.marginLeft = "-16px";
			loading.style.width = "32px"; 
            loading.style.height = "32px";
			loading.style.paddingLeft = "5px";
			loading.style.paddingRight = "5px";
			loading.style.position = "fixed";
			loading.style.zIndex = "9999";
			loading.innerHTML = 'Loading ...';
		    loading.innerHTML = "<img alt='Loading, Please Wait...' src='scripts/images/ajaxload.gif' />";
			document.body.appendChild(loading);
			
}
			
		
		
		function load_PostCallBack() 
		
		{
			var loading = document.getElementById("loading");
			document.body.removeChild(loading);
		}