function switchMenu(curr_id, total_num)
{
	for(var i=0; i<total_num; i++)
	{
		var el = document.getElementById('menu_sub_'+i);
		var img = document.getElementById('menu_master_'+i);
		if(!el || !img) return;

		if(i == curr_id)
		{
			dis=el.style.display;
			if(dis == "block"){
				el.style.display = "none";
				img.src = "../common/images/english/close4.gif";
			}else{
				el.style.display = "block";
				img.src = "../common/images/english/open4.gif";
			}
		}
		else
		{
			el.style.display = "none";
			img.src = "../common/images/english/close4.gif";
		}
	}
}
function subdis(list,curr_id, total_num){
	//list代表不同大类的产品
	for(var i=0; i<total_num; i++)
	{
		var subel = document.getElementById('sub'+list+'_menu_'+i);
		var img = document.getElementById('sub'+list+'_master_'+i);

		if(!subel || !img) return;
		
		if(i == curr_id)
		{
			dis=subel.style.display;
			if(dis == "block"){
				subel.style.display = "none";
				img.src = "../common/images/english/close4.gif";
			}else{
				subel.style.display = "block";
				img.src = "../common/images/english/open4.gif";
			}
		}
		else
		{
			subel.style.display = "none";
			img.src = "../common/images/english/close4.gif";
		}
	}
}