adminmenu.js

来自「blog程序~~~ ~~~~~」· JavaScript 代码 · 共 61 行

function dropdownmenu(obj) {
	var dropmenuobj=document.getElementById("dropmenudiv");
	if (!dropmenuobj || dropmenuobj==null) { //IE6...
		document.getElementById("dropcontainer").innerHTML='<div id="dropmenudiv" class="dropmenudiv" style="position:absolute;top:-15px;visibility:hidden;" onmouseout="delayhidemenu(event)" onmouseover="delayhidemenulong(event)"></div>';
		dropmenuobj=document.getElementById("dropmenudiv");
	}
	dropmenuobj.x=getposOffset(obj, "left");
	dropmenuobj.y=getposOffset(obj, "top");
	dropmenuobj.style.left=dropmenuobj.x-clearbrowseredge(obj, "rightedge")+"px";
	dropmenuobj.style.top=dropmenuobj.y-clearbrowseredge(obj, "bottomedge")+obj.offsetHeight+"px";
	dropmenuobj.style.visibility='visible';
}

function clearbrowseredge(obj, whichedge) {
	var dropmenuobj=document.getElementById("dropmenudiv");
	if (!dropmenuobj || dropmenuobj==null) return 0;
	var edgeoffset=0;
	if (whichedge=="rightedge") {
		var windowedge=(is_ie4) ? iecompattest().scrollLeft+iecompattest().clientWidth-15 : window.pageXOffset+window.innerWidth-15;
		dropmenuobj.contentmeasure=dropmenuobj.offsetWidth;
		if (windowedge-dropmenuobj.x < dropmenuobj.contentmeasure) edgeoffset=dropmenuobj.contentmeasure-obj.offsetWidth;
	}
	else {
		var topedge=(is_ie4) ? iecompattest().scrollTop : window.pageYOffset;
		var windowedge=(is_ie4) ? iecompattest().scrollTop+iecompattest().clientHeight-15 : window.pageYOffset+window.innerHeight-18;
		dropmenuobj.contentmeasure=dropmenuobj.offsetHeight;
		if (windowedge-dropmenuobj.y < dropmenuobj.contentmeasure) { //move up?
			edgeoffset=dropmenuobj.contentmeasure+obj.offsetHeight;
			if ((dropmenuobj.y-topedge)<dropmenuobj.contentmeasure) //up no good either?
			edgeoffset=dropmenuobj.y+obj.offsetHeight-topedge;
		}
	}
	return edgeoffset;
}

function iecompattest() {
	return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body;
}

function getposOffset(what, offsettype) {
	var totaloffset=(offsettype=="left") ? what.offsetLeft : what.offsetTop;
	var parentEl=what.offsetParent;
	while (parentEl!=null)	{
		totaloffset=(offsettype=="left")? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;
		parentEl=parentEl.offsetParent;
	}
	return totaloffset;
}

function delayhidemenu() {
	//delayhide=setTimeout("hidemenu()", 8000);
}

function delayhidemenulong() {
	//delayhide=setTimeout("hidemenu()", 50000);
}

function hidemenu(e) {
	var dropmenuobj=document.getElementById("dropmenudiv");
	if (dropmenuobj && dropmenuobj!=null) dropmenuobj.style.visibility="hidden";
}