仿西街网搜索价格滚动，滑块滚动

答案：<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>仿西街网搜索价格滚动</title>
<style> 
#dragbar{position:relative; width:170px; top:26px; float:left;}
#long_bar{ height:0.6em; border:1px solid #aaa; border-radius:4px;}
#small_bar{ background:#ccc; position:absolute; z-index:1; top:1px; height:0.6em; line-height:0.6em; overflow:hidden;}
#long_bar .btn{ width:1.2em; z-index:2; position:absolute; height:1.2em; cursor:pointer; top:-0.3em; margin-left:-0.6em; background:#D72D2E; border-radius:4px; border:1px solid #D3D3D3;}
.price{ width:100px; padding:22px 5px 0; height:18px; color:#c90202; float:left; text-align:center;}
</style>
</head> 
<body>
<div id="min_price" class="price" style="margin-right:5px;">100元</div>
<div id="dragbar">
    <div id="long_bar">
        <div id="small_bar"></div>
        <span class="btn"></span>
        <span class="btn"></span>
    </div>
</div>
<div id="max_price" class="price" style="margin-left:5px;">1319元</div>
</body>
<script> 
window.onload=function(){
	var longbar=document.getElementById("long_bar");
	var smallbar=document.getElementById("small_bar");
	var arrbtn=longbar.getElementsByTagName("span");
	var minP=document.getElementById("min_price");
	var maxP=document.getElementById("max_price");
	var minprice=parseInt(minP.innerHTML);
	var maxprice=parseInt(maxP.innerHTML);
	var total=maxprice-minprice,Isclick=false,zindex=2;
	smallbar.style.width=100+"%";
	smallbar.style.left=0;
	arrbtn[0].style.left=0;
	arrbtn[1].style.left=100+"%";
	var maxwidth=longbar.offsetWidth;//最大移动值
	arrbtn[0].onmousedown=function(e){
		Isclick=true;
		this.style.zIndex=++zindex;
		var x=(e||window.event).clientX;//取点击位置的X轴长度值
		//按钮的x轴长度值
		var lenght=this.offsetLeft+(this.offsetWidth/2-1);
		var btn2lenght=arrbtn[1].offsetLeft+(arrbtn[1].offsetWidth/2-1);
		var maxlenght=Math.min(maxwidth,btn2lenght);
		var btn=this;
		document.onmousemove=function(e){
			if(Isclick)
			{
				var thisX=(e||window.event).clientX;//当前移动位置的X轴长度值
				var golenght=Math.min(maxlenght,Math.max(0,lenght+(thisX-x)));//移动的长度
				var leftVal=(golenght/maxwidth)*100;
				btn.style.left=leftVal+"%";//使用百分比
				smallbar.style.left=btn.style.left;
				smallwidth();
				price(minP,leftVal);
			}
			else
			{
				return false;
			}
			//window.getSelection ? window.getSelection.removeAllRanges : document.selection.empty;//判断是否有选中项
		}
		document.onmouseup=window.onblur=btn.onlosecapture=function()
		{
			Isclick=false;
			btn.releaseCapture && btn.releaseCapture();
		};
		this.setCapture && this.setCapture();
		return false; 
	}
	arrbtn[1].onmousedown=function(e){
		Isclick=true;
		this.style.zIndex=++zindex;
		var x=(e||window.event).clientX;
		var lenght=this.offsetLeft+(this.offsetWidth/2-1);
		var btn1lenght=arrbtn[0].offsetLeft+(arrbtn[0].offsetWidth/2-1);
		var minlenght=Math.max(0,btn1lenght);
		var btn1=this;
		document.onmousemove=function(e){
			if(Isclick)
			{
				var thisX=(e||window.event).clientX;
				var golenght=Math.max(minlenght,Math.min(maxwidth,lenght+(thisX-x)));
				var leftVal=(golenght/maxwidth)*100;
				btn1.style.left=leftVal+"%";
				smallwidth();
				price(maxP,leftVal);
			}
			else
			{
				return false;
			}
			//window.getSelection ? window.getSelection.removeAllRanges : document.selection.empty;
		}
		document.onmouseup=window.onblur=btn1.onlosecapture=function()
		{
			Isclick=false;
			btn1.releaseCapture && btn1.releaseCapture();
		};
		this.setCapture && this.setCapture();
		return false; 
	}
	function smallwidth(){
		var left=parseFloat(arrbtn[0].style.left);
		var right=parseFloat(arrbtn[1].style.left);
		smallbar.style.width=(right-left>0?Math.floor(right-left):0)+"%";
	}
	function price(obj,leftVal){
		var p=parseInt((total/100)*leftVal)+minprice;
		if(p>minprice && p<maxprice){p=p%5>3?p+(5-(p%5)):p-(p%5)}
		obj.innerHTML=p+"元";
	}
}
</script>
</html>
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