function show_loading(){
			
	$("body").append("<div class='dialog-overlay' id='dialog-overlay'></div>");
	$("body").append("<div class='dialog-loading' id='dialog-loading'><p>Please Wait...<p></div>");
				
			
}//end function
			
function hide_loading(){
					
	$( "#dialog-overlay" ).remove();
	$( "#dialog-loading" ).remove();
			
}//end function