var yi; 
	function show(id)
	{
		for(i=1;i<9;i++)
		{
			var yid="a"+i;
			if(document.getElementById(yid).style.backgroundImage=="url(image/default/bg_menu_on.gif)")
			{	 
				yi=yid; 
			}
			document.getElementById(yid).style.backgroundImage="";
		}
		document.getElementById(id).style.backgroundImage="url(image/default/bg_menu_on.gif)";
	}
	
	function hid(id)
	{
		document.getElementById(id).style.backgroundImage="";
		if(yi)
			document.getElementById(yi).style.backgroundImage="url(image/default/bg_menu_on.gif)";

	}
	function hiid()
	{
		if(yi)
			document.getElementById(yi).style.backgroundImage="";
	}
	function select_form(i)
	{
		if(i==1)
			$('sear').action='buy_list.php';
		if(i==2)
			$('sear').action='product_list.php';
		if(i==3)
			$('sear').action='company_list.php';
	}
	function h(obj,url)
	{
		obj.style.behavior='url(#default#homepage)';obj.setHomePage(url);
	}
	function myAddPanel(url,title)
	{
		var desc=title+"，努力创造诚信的网络平台";
		if ((typeof window.sidebar == 'object') && (typeof window.sidebar.addPanel == 'function'))
		{
			window.sidebar.addPanel(title,url,desc);
		}
		else
		{
			window.external.AddFavorite(url,title);
		}
	}