Js打造層拖動實例：網站菜單拖拽移位效果_菜單導航特效

一個基于JavaScript的層手動實例，讓網站的菜單可以拖拽移位，記得土豆網的“豆單”有這種功能。本效果還尚未徹底完成，部分地方因沒有寫入對應內容，因此JS可能會提示有錯誤。

<html>
<head> 
<meta http-equiv="Content-Type" mrc="text/html; charset=UTF-8" />
<title>層拖動</title>
<style type="text/css">
*{ margin:0; padding:0}
li{ list-style:none}
.wapper{ width:500px; margin:50px;height:auto; overflow:hidden; position:relative; border:1px #e6e6e6 solid}
.wapper ol{ position:absolute;top:0; left:0}
.wapper li{width:30px; height:32px; line-height:32px; padding:3px 0; text-align:center;}
.wapper .m-li{ padding:3px 3px 3px 30px;height:32px;position:relative}
.wapper .m-li div,.wapper .m-li-cur div{ line-height:30px; height:30px;background:#ECF3F9; border:1px #ccc solid; padding:0 0 0 16px;color:#316DA9; font-size:14px;cursor:move;}
.wapper .m-li .m-sub-cur,.wapper .m-li-cur .m-sub-cur{opacity:0.35;filter:Alpha(opacity=35);}
.wapper .m-li-cur{ padding:0 3px 3px 30px; border-top:3px #FFDAAD solid}
.wapper .m-li-cur span{ padding:0 0 3px;}
#tips{ position:absolute; top:0;left:0;cursor:move; z-index:2;display:none}
#tips div{background:#FDFFDA;line-height:30px; height:30px;border:1px #ccc solid; padding:0 0 0 16px;color:#316DA9; font-size:14px;}
</style>
</head>
<body>
<div class="wapper" id="box">
<div class="m-wapper">
<div class="m-li"><div class="m-sub">ASP源碼</div></div>
<div class="m-li"><div class="m-sub">PHP源碼</div></div>
<div class="m-li"><div class="m-sub">JSP源碼</div></div>
<div class="m-li"><div class="m-sub">JAVA源碼</div></div>
</div>
<ol id="m-num"></ol>
<div id="tips"></div>
</div>
<script type="text/javascript">
document.getElementsByClassName=function(eleClassName){
	var getEleClass = [];
	var myclass = new RegExp("\\b"+eleClassName+"\\b");
	var elem = this.getElementsByTagName("*");
	for(var h=0;h<elem.length;h++){
		var classes = elem[h].className;
		if (myclass.test(classes)) getEleClass.push(elem[h]);
	}
	return getEleClass;
}
function $(o){
	var t = document.getElementById(o);
	return t?t:false;
}
function hasClass(ele,cls) {
	return ele.className.match(new RegExp('(\\s|^)'+cls+'(\\s|$)'));
}
 
function addClass(ele,cls) {
	if (!this.hasClass(ele,cls)) ele.className += " "+cls;
}
 
function removeClass(ele,cls) {
	if (hasClass(ele,cls)) {
		 var reg = new RegExp('(\\s|^)'+cls+'(\\s|$)');
    ele.className=ele.className.replace(reg,' ');
	}
}
function getStyle(o,n){
	return o.currentStyle?o.currentStyle[n]:(document.defaultView.getComputedStyle(o,"").getPropertyValue(n))
}
function f(){
	var d=document;
	var mNum = document.getElementById("m-num");
	var ols = document.getElementsByClassName("m-wapper")[0];
	var lis = document.getElementsByClassName("m-li");
	var divs = document.getElementsByClassName("m-sub");
	var tips = document.getElementById("tips");
	
	for(var i=0;i<divs.length;i++){
		var mnumNode=document.createElement("li");
		mNum.appendChild(mnumNode);
		mNum.getElementsByTagName("li")[i].innerHTML=i+1;
		divs[i].onmouseover=function(e){
			show(this);
		}
	}
	function show(obj){
		for(var i=0;i<divs.length;i++){
			if(divs[i]==obj){
				var voidNum=i;
				obj.onmousedown=function(e){
					
					var cloneNode=obj.cloneNode(true);/*克隆節點*/
					tips.appendChild(cloneNode);
					//alert(i)
					tips.style.width=obj.offsetWidth+"px";
					tips.style.display="block";
					//alert(voidNum);
					tips.style.top=(38*voidNum)+3+"px";
					tips.style.left="30px"
					for(var j=0;j<divs.length;j++){ /*恢復行默認樣式*/
						divs[j].className="m-sub";
					}
					
					obj.className="m-sub-cur"; /*選中行添加新樣式*/
					tips.onmouseover=function(e){
						window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty();//清除選擇
						
						e=e||event;                /*鼠標定位*/
						var x=e.clientY-tips.offsetTop;
						//var y=e.clientX-obj.offsetLeft;
						d.onmousemove=function(e){
							e=e||event;
							var tipsTop = e.clientY-x;
							tips.style.top=tipsTop+"px";
							if(tipsTop <= 3){
								tips.style.top="3px";
							}
							if(tipsTop >= (38*(i-1)+3)){
								tips.style.top=38*(i-1)+3+"px";
							}
							lisNum = Math.round((tipsTop-3)/38);
							if(lisNum>=i){
									lisNum=i;
								}
							for(var n=0; n<divs.length; n++){
								lis[n]["className"]="m-li";
								lis[lisNum]["className"]="m-li-cur";
							}
							//obj.style.left=e.clientX-y+"px";
						}
						d.onmouseup = function(){ 
							d.onmouseup=d.onmousemove="";
							tips.style.display="none";
							for(var n=0; n<lis.length; n++){
								lis[n]["className"]="m-li";
							}
							obj.className="m-sub";
							var newNode=document.createElement("div");
							var delNode=tips.getElementsByTagName("div")[0];/*清空節點*/
							var delNode2=lis[voidNum];/*清空節點*/
							newNode.appendChild(delNode);
							newNode.className="m-li";
							ols.insertBefore(newNode,lis[lisNum]);
							ols.removeChild(delNode2);
							tips.removeChild(delNode);
						}
					}
				}
			}
		}
	}
}
f();
</script>
</body>
</html>

所屬頻道：菜單導航特效/更新時間：2012-11-15

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