// javascript document
$(document).ready(function() {
    $(".nav ul li").hover(function(){
		$(this).children(".drop_dwon").slidedown(100);
		jquery(this).children(".nav ul li a").attr("id","currlayout")
		},
		function(){
		$(this).children(".drop_dwon").slideup(100);	
		jquery(this).children(".nav ul li a").attr("id","")
		});	
});