//用于菜单显示，隐藏
function showMenu(id){
//	alert(id);
	//判断用户点击哪个主标题
	var title = document.getElementById(id).style.display;
	if(id == "title1"){
		//对菜单进行判断，如果是隐藏则显示，如果是显示则进行隐藏
		if(title == "none"){
			document.getElementById(id).style.display = "block";
		}
		else{
			document.getElementById(id).style.display = "none";
		}
		//把其它的菜单进行隐藏
		if(document.getElementById("title2").style.display != "none")
		document.getElementById("title2").style.display = "none";
		if(document.getElementById("title3").style.display != "none")
		document.getElementById("title3").style.display = "none";
		if(document.getElementById("title4").style.display != "none")
		document.getElementById("title4").style.display = "none";
	}
	else if (id == "title2"){		
		//对菜单进行判断，如果是隐藏则显示，如果是显示则进行隐藏
		if(title == "none"){
			document.getElementById(id).style.display = "block";
		}
		else{
			document.getElementById(id).style.display = "none";
		}
		//把其它的菜单进行隐藏
		if(document.getElementById("title1").style.display != "none")
		document.getElementById("title1").style.display = "none";
		if(document.getElementById("title3").style.display != "none")
		document.getElementById("title3").style.display = "none";
		if(document.getElementById("title4").style.display != "none")
		document.getElementById("title4").style.display = "none";
	}
	else if(id == "title3"){		
		//对菜单进行判断，如果是隐藏则显示，如果是显示则进行隐藏
		if(title == "none"){
			document.getElementById(id).style.display = "block";
		}
		else{
			document.getElementById(id).style.display = "none";
		}
		//把其它的菜单进行隐藏
		if(document.getElementById("title1").style.display != "none")
		document.getElementById("title1").style.display = "none";
		if(document.getElementById("title2").style.display != "none")
		document.getElementById("title2").style.display = "none";
		if(document.getElementById("title4").style.display != "none")
		document.getElementById("title4").style.display = "none";
	}
	else{
		//对菜单进行判断，如果是隐藏则显示，如果是显示则进行隐藏
		if(title == "none"){
			document.getElementById(id).style.display = "block";
		}
		else{
			document.getElementById(id).style.display = "none";
		}
		//把其它的菜单进行隐藏
		if(document.getElementById("title1").style.display != "none")
		document.getElementById("title1").style.display = "none";
		if(document.getElementById("title2").style.display != "none")
		document.getElementById("title2").style.display = "none";
		if(document.getElementById("title3").style.display != "none")
		document.getElementById("title3").style.display = "none";		
	}
}


//控制菜单的显示和隐藏，如果菜单是显示的则进行隐藏，如果是隐藏则进行显示
function showMenu2(id){
	
	if(document.getElementById(id).style.display == "none"){
		document.getElementById(id).style.display = "block";
	}
	else{
		document.getElementById(id).style.display = "none"
	}
}