$(document).ready(function(){
	//底部栏目
	  var gd_body=$(document.body).height();
	  var gd_footer=$("#footer").height();
	  var gd_top=$("#top").height()+$("#header").height()+$("#topnav").height()+$("#search").height();
	  var gd_window=$(window).height();
	    if(gd_body<=gd_window){
	      var gd_main=gd_window-gd_top-gd_footer-55;
	      $("#main").css("height",gd_main);
	    }
	  $(window).resize(function() {
	    var gd_window=$(window).height();
	    if(gd_body<=gd_window){
	      var gd_main=gd_window-gd_top-gd_footer-55;
	      $("#main").css("height",gd_main);
	    }
	  });
	//通用下拉菜单
	$(".selecter").each(function(i,dom){
		$(dom).children("h2").mouseover(function(){
			$(dom).children("h2").addClass("hover");
			$(dom).children("ul").addClass("indextop");
			$(dom).children("ul").after("<iframe></iframe>");
		});
		$(dom).children("h2").mouseout(function(){
			$(dom).children("h2").removeClass("hover");
			$(dom).children("ul").removeClass("indextop");
			$(dom).children("iframe").remove();
		});
		$(dom).children("ul").mouseover(function(){
			$(dom).children("h2").addClass("hover");
			$(dom).children("ul").addClass("indextop");
			$(dom).children("ul").after("<iframe></iframe>");
		});
		$(dom).children("ul").mouseout(function(){
			$(dom).children("h2").removeClass("hover");
			$(dom).children("ul").removeClass("indextop");
			$(dom).children("iframe").remove();
		});
	});	
	//topnav下拉菜单
	$("#topnav div").each(function(i,dom){
		var gd_iframe=$(dom).children("ul").height();
		$(dom).children("span").mouseover(function(){
			$(dom).children("span").addClass("hover");
			$(dom).children("ul").addClass("indextop");
			$(dom).children("ul").after("<iframe></iframe>");
			$(dom).children("iframe").css("height",gd_iframe);
		});
		$(dom).children("span").mouseout(function(){
			$(dom).children("span").removeClass("hover");
			$(dom).children("ul").removeClass("indextop");
			$(dom).children("iframe").remove();
		});
		$(dom).children("ul").mouseover(function(){
			$(dom).children("span").addClass("hover");
			$(dom).children("ul").addClass("indextop");
			$(dom).children("ul").after("<iframe></iframe>");
			$(dom).children("iframe").css("height",gd_iframe);
		});
		$(dom).children("ul").mouseout(function(){
			$(dom).children("span").removeClass("hover");
			$(dom).children("ul").removeClass("indextop");
			$(dom).children("iframe").remove();
		});
});

	//
})