//菜单
var menuOffX = 0;	//菜单距连接文字最左端距离
var menuOffY = 15;	//菜单距连接文字顶端距离

var ie4 = document.all && navigator.userAgent.indexOf("Opera")==-1;
var ns6 = document.getElementById && !document.all;

function showmenu(e, vmenu, mod){
	which = vmenu;
	menuobj = document.getElementById("popmenu");
	menuobj.thestyle = menuobj.style;
	menuobj.innerHTML = which;
	menuobj.contentwidth = menuobj.offsetWidth;
	eventX = e.clientX;
	eventY = e.clientY;
	var rightedge = document.body.clientWidth - eventX;
	var bottomedge = document.body.clientHeight - eventY;

	if (rightedge < menuobj.contentwidth)
		menuobj.thestyle.left = document.body.scrollLeft + eventX - menuobj.contentwidth + menuOffX;
	else
		menuobj.thestyle.left = ie4? ie_x(event.srcElement) + menuOffX : ns6? window.pageXOffset+eventX : eventX;
	
	if (bottomedge < menuobj.contentheight&&mod!=0)
		menuobj.thestyle.top = document.body.scrollTop + eventY - menuobj.contentheight - event.offsetY + menuOffY-23;
	else
		menuobj.thestyle.top = ie4? ie_y(event.srcElement) + menuOffY : ns6? window.pageYOffset + eventY + 10 : eventY;

	menuobj.thestyle.visibility = "visible";
}

function ie_y(e){  
	var t = e.offsetTop;  
	while(e = e.offsetParent){  
		t += e.offsetTop;  
	}  
	return t;  
}

function ie_x(e){  
	var l = e.offsetLeft;  
	while(e = e.offsetParent){  
		l += e.offsetLeft;  
	}  
	return l;  
}

function highlightmenu(e, state){
	if (document.all)
		source_el = event.srcElement;
		while(source_el.id != "popmenu"){
			source_el = document.getElementById? source_el.parentNode : source_el.parentElement;
			if (source_el.className == "menuitems"){
				source_el.id = (state=="on")? "mouseoverstyle" : "";
		}
	}
}

function hidemenu(){
	if (window.menuobj)
		menuobj.thestyle.visibility="hidden"
}

function dynamichide(e){
	if ((ie4||ns6)&&!menuobj.contains(e.toElement))
		hidemenu()
	}

document.onclick = hidemenu;
document.write("<div class=menuskin id=popmenu onmouseover=highlightmenu(event,'on') onmouseout=highlightmenu(event,'off');dynamichide(event)></div>")
// 菜单END