js实现下拉框菜单插件(特别推荐)

时间：2022-06-25 20:31:05 编辑：袖梨来源：一聚教程网

提示：您可以先修改部分代码再运行

<!DOCTYPE HTML>
<html lang="en-US">
<head>
	<meta charset="UTF-8">
	<title>网友涛涛分享原创js实现下拉框菜单插件</title>
	<style>
	.haha{  float:left;}
	body,div,input,ul,li{margin: 0;padding:0}
	.diy_select{position: relative;font-size: 12px; margin-bottom:10px;background: #fff;color: #000;float: left;}
	.diy_select_btn,.diy_select_txt{float: left;height: 100%;line- cursor:pointer;}
	.diy_select,.diy_select_list{border: 1px solid #73839F;}
	.diy_select_txt{}
	.diy_select_txt,.diy_select_list li{text-indent: 10px;overflow: hidden}
	.diy_select_btn{background: url(rec.gif) no-repeat center}
	.diy_select_list{position: absolute;top: 28px;left: -1px;z-index: 88888;border-top: none;width: 100%;display: none;_top:29px; background-color:#FFF;}
	.diy_select_list li{list-style: none;line-cursor:default;_background:#fff}
	.diy_select_list li.focus{background: #3399FF;color: #fff}
	</style>
</head>
<body>
<div class="haha">
	<form >
	<div class='diy_select' >
		 <input type='hidden' name='' class='diy_select_input'/>
		 <div class='diy_select_txt'>--请选择区--</div>
		 <div class='diy_select_btn'></div>
		 <ul class='diy_select_list'>
		 	<li class='a'>Javascript</li>
		 	<li>Html</li>
		 	<li>Css</li>
		 	<li>Php</li>
		 	<li>Jquery</li>
		 </ul>
		
	</div>
	<div class='diy_select' >
		
		 <input type='hidden' name='' class='diy_select_input'/>
		 <div class='diy_select_txt'>--请选择价格--</div>
		 <div class='diy_select_btn'></div>
		 <ul class='diy_select_list'>
		 	<li>Javascript</li>
		 	<li>Html</li>
		 	<li>Css</li>
		 	<li>Php</li>
		 	<li>Jquery</li>
		 </ul>		
	</div>
    
	<div class='diy_select' >		
		 <input type='hidden' name='' class='diy_select_input'/>
		 <div class='diy_select_txt'>--请选择特业类型--</div>
		 <div class='diy_select_btn'></div>
		 <ul class='diy_select_list'>
		 	<li>Javascript</li>
		 	<li>Html</li>
		 	<li>Css</li>
		 	<li>Php</li>
		 	<li>Jquery</li>
		 </ul>		
	</div>
    <div class='diy_select' >		
		 <input type='hidden' name='' class='diy_select_input'/>
		 <div class='diy_select_txt'>--请选择面积--</div>
		 <div class='diy_select_btn'></div>
		 <ul class='diy_select_list'>
		 	<li>Javascript</li>
		 	<li>Html</li>
		 	<li>Css</li>
		 	<li>Php</li>
		 	<li>Jquery</li>
		 </ul>		
	</div>
 </form>
</div>
	<script>
	    function diy_select(){this.init.apply(this,arguments)};
	    diy_select.prototype={
	    	 init:function(opt)
	    	 {
	    	 	this.setOpts(opt);
	    	 	this.o=this.getByClass(this.opt.TTContainer,document,'div');//容器
	    	 	this.b=this.getByClass(this.opt.TTDiy_select_btn);//按钮
	    	 	this.t=this.getByClass(this.opt.TTDiy_select_txt);//显示
	    	 	this.l=this.getByClass(this.opt.TTDiv_select_list);//列表容器
	    	 	this.ipt=this.getByClass(this.opt.TTDiy_select_input);//列表容器
	    	 	this.lengths=this.o.length;
	    	 	this.showSelect();
	    	 },
	    	 addClass:function(o,s)//添加class
	    	 {
	    	 	o.className = o.className ? o.className+' '+s:s;
	    	 },
	    	 removeClass:function(o,st)//删除class
	    	 {
	    	 	var reg=new RegExp('b'+st+'b');
	    	 	o.className=o.className ? o.className.replace(reg,''):'';
	    	 },
	    	 addEvent:function(o,t,fn)//注册事件
	    	 {
	    	 	return o.addEventListener ? o.addEventListener(t,fn,false):o.attachEvent('on'+t,fn);
	    	 },
	    	 showSelect:function()//显示下拉框列表
	    	 {
	    	 	var This=this;
	    	 	var iNow=0;
	    	 	this.addEvent(document,'click',function(){
	    	 		 for(var i=0;i<This.lengths;i++)
	    	 		 {
	    	 		 	This.l[i].style.display='none';
	    	 		 }
	    	 	})
	    	 	for(var i=0;i<this.lengths;i++)
	    	 	{
	    	 		this.l[i].index=this.b[i].index=this.t[i].index=i;
	    	 		this.t[i].onclick=this.b[i].onclick=function(ev)  
	    	 		{
	    	 			var e=window.event || ev;
	    	 			var index=this.index;
	    	 			This.item=This.l[index].getElementsByTagName('li');

This.l[index].style.display= This.l[index].style.display=='block' ? 'none' :'block';
		    	 		for(var j=0;j<This.lengths;j++)
		    	 		{
		    	 			if(j!=index)
		    	 			{
		    	 				This.l[j].style.display='none';
		    	 			}
		    	 		}
		    	 		This.addClick(This.item);
		    	 		e.stopPropagation ? e.stopPropagation() : (e.cancelBubble=true); //阻止冒泡
	    	 		}
	    	 	}
	    	 },
	    	 addClick:function(o)//点击回调函数
	    	 {

if(o.length>0)
	    	 	{
	    	 		var This=this;
	    	 		for(var i=0;i<o.length;i++)
	    	 		{
	    	 			o[i].onmouseover=function()
	    	 			{
	    	 				This.addClass(this,This.opt.TTFcous);
	    	 			}
	    	 			o[i].onmouseout=function()
	    	 			{
	    	 				This.removeClass(this,This.opt.TTFcous);
	    	 			}
	    	 			o[i].onclick=function()
	    	 			{
	    	 				var index=this.parentNode.index;//获得列表
	    	 				This.t[index].innerHTML=This.ipt[index].value=this.innerHTML.replace(/^s+/,'').replace(/s+&/,'');
	    	 				This.l[index].style.display='none';
	    	 			}
	    	 		}
	    	 	}
	    	 },
	    	 getByClass:function(s,p,t)//使用class获取元素
	    	 {
	    	 	var reg=new RegExp('b'+s+'b');
	    	 	var aResult=[];
	    	 	var aElement=(p||document).getElementsByTagName(t || '*');

for(var i=0;i<aElement.length;i++)
	    	 	{
	    	 		if(reg.test(aElement[i].className))
	    	 		{
	    	 			aResult.push(aElement[i])
	    	 		}
	    	 	}
	    	 	return aResult;
	    	 },

setOpts:function(opt) //以下参数可以不设置  //设置参数
	    	 { 
	    	 	this.opt={
	    	 		 TTContainer:'diy_select',//控件的class
	    	 		 TTDiy_select_input:'diy_select_input',//用于提交表单的class
	    	 		 TTDiy_select_txt:'diy_select_txt',//diy_select用于显示当前选中内容的容器class
	    	 		 TTDiy_select_btn:'diy_select_btn',//diy_select的打开按钮
	    	 		 TTDiv_select_list:'diy_select_list',//要显示的下拉框内容列表class
	    	 		 TTFcous:'focus'//得到焦点时的class
	    	 	}
	    	 	for(var a in opt)  //赋值 ,请保持正确,没有准确判断的
	    	 	{
	    	 		this.opt[a]=opt[a] ? opt[a]:this.opt[a];
	    	 	}
	    	 }
	    }
	  
var TTDiy_select=new diy_select({  //参数可选
		TTContainer:'diy_select',//控件的class
		TTDiy_select_input:'diy_select_input',//用于提交表单的class
		TTDiy_select_txt:'diy_select_txt',//diy_select用于显示当前选中内容的容器class
		TTDiy_select_btn:'diy_select_btn',//diy_select的打开按钮
		TTDiv_select_list:'diy_select_list',//要显示的下拉框内容列表class
		TTFcous:'focus'//得到焦点时的class
});//如同时使用多个时请保持各class一致.
	</script>
</body>
</html></td>
	  </tr>
	</table>

提示：您可以先修改部分代码再运行

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