var NavSubCata={
	_cataid:null,
	_cataidobj:null,
	_ishide:null,
	show:function(cataid){
		this._cataid=cataid;
		this._cataidobj=$("#"+cataid);
		this._ishide=false;
		
		this.initCataidObj();
		this.showSubCata();
	},
	initCataidObj:function(){
		this._cataidobj.hover(function(){},
			function(){
				NavSubCata._ishide=true;
				setTimeout("NavSubCata.hide()",500);
			}
		);
	},
	showSubCata : function(){
		$("#navsubcata").remove()
		var html='<div id="navsubcata" style="display:none;"><ul id="navul"></ul></div>';
		$("body").append(html);
		$.get(
			"/homepage/parts/headersubcata.jsp",
			{"gid":this._cataid},
			function(data){
				$("#navul").html(data);
			}
			
		);
		
		var offset=this._cataidobj.offset();
		$("#navsubcata").css({"position":"absolute","left":offset.left-20,"top":offset.top+18,"zIndex":"500","background-color":"#F8F9FD"});
		$("#navsubcata").hover(
			function(){
				NavSubCata._ishide=false;
			},
			function(){
				NavSubCata._ishide=true;
				NavSubCata.hide();
			}
		);
		$("#navsubcata").show();
	},
	hide:function(){
		if( this._ishide )
			$("#navsubcata").slideUp(500);
	}
};