//显示下一级菜单
function showLabelLink(p_iSign, p_iTop){
	var objNode = document.getElementById("div_" + p_iSign);
	if (objNode != null){
		if (Browsertype() == "ie"){
			objNode.style.left = getX(MM_findObj('menu_div'))+250;
			objNode.style.display = "block";			
		} else if (Browsertype() == "firefox") {
			objNode.style.left = ((document.body.clientWidth/2)-49.5);
			objNode.style.display = "block";	
		}
	}
}

//仅仅显示下一级菜单,不修改属性
function keepLabelLinkShow(p_iSign){
	var objNode = document.getElementById("div_" + p_iSign);
	if (objNode != null){
		objNode.style.display = "block";
	}
}

//隐藏菜单
function hideLabelLink(p_iSign){
	var objNode = document.getElementById("div_" + p_iSign);
	if (objNode != null){
		objNode.style.display = "none";
	}
}

function getY(obj){    
	return (obj.offsetParent ? obj.offsetTop + getY(obj.offsetParent) : obj.y ? obj.y : 0);    
}  
function getX(obj){   
	return obj.offsetLeft + (obj.offsetParent ? getX(obj.offsetParent) : obj.x ? obj.x : 0);   
} 

function Browsertype() {
	var Sys = {};
	var ua = navigator.userAgent.toLowerCase();
	var s;
	(s = ua.match(/msie ([\d.]+)/)) ? Sys.ie = s[1] :
	(s = ua.match(/firefox\/([\d.]+)/)) ? Sys.firefox = s[1] :
	(s = ua.match(/chrome\/([\d.]+)/)) ? Sys.chrome = s[1] :
	(s = ua.match(/opera.([\d.]+)/)) ? Sys.opera = s[1] :
	(s = ua.match(/version\/([\d.]+).*safari/)) ? Sys.safari = s[1] : 0;
	
	//以下进行测试
	if (Sys.ie) {return "ie";}
	if (Sys.firefox) {return "firefox";}
	if (Sys.chrome) {return "chrome";}
	if (Sys.opera) {return "opera";}
	if (Sys.safari) {return "safari";}
}