css层滚动条


            
 
层滚动条DIY - Powered by yexj00 
 
<!-- 
*{ font-size: 12px} 
--> 
 

 
<!-- 
 function $(obj){ 
return document.all[obj]; 
 } 
 function setbarHeight(){  
$("scroll_bar").style.height=($("scroll_content").clientHeight)/($("scroll_content").scrollHeight)*($("scroll_area").offsetHeight)+"px"; 
if($("scroll_bar").offsetHeight>=$("scroll_area").offsetHeight){ 
$("scroll_bar").style.display='none'; 
  } 
 } 
//--> 
 

 
<!-- 
var drag=false; //是否允许拖动 
var mx,my; 
var scrollbar_L; 
var scrollbar_T; 
var scrollbar_W; 
var scrollbar_H; 
var scrollarea_T,scrollarea_H; 
var startT,startY; 

function getInfor(){ 
mx=event.clientX+document.documentElement.scrollLeft; 
my=event.clientY+document.documentElement.scrollTop;  
scrollbar_L=document.documentElement.clientLeft+$("outerDiv").style.pixelLeft+$("scroll_area").offsetLeft+$("scroll_bar").offsetLeft; 
scrollbar_T=document.documentElement.clientTop+$("outerDiv").style.pixelTop+$("scroll_area").offsetTop+$("scroll_bar").offsetTop; 
scrollbar_W=$("scroll_bar").offsetWidth; 
scrollbar_H=$("scroll_bar").offsetHeight; 
scrollarea_T=document.documentElement.clientTop+$("outerDiv").style.pixelTop+$("scroll_area").offsetTop; 
scrollarea_H=$("scroll_area").offsetHeight; 
} 

function dragit(){ 
getInfor(); 

if(event.srcElement.id=="scroll_bar"){ 
  drag=true; 
  $("scroll_bar").style.background="#cccccc"; 
  startT=$("scroll_bar").style.pixelTop; 
  startY=event.clientY; 
 document.onmousemove=move; 
   } 
 } 
function move(){ 
if(drag==true){ 
$("scroll_bar").style.pixelTop=startT+event.clientY-startY; 
$("scroll_content").scrollTop=$("scroll_bar").style.pixelTop/$("scroll_area").offsetHeight*$("scroll_content").scrollHeight; 
if($("scroll_bar").style.pixelTop<=0){ $("scroll_bar").style.pixelTop=0} 
if($("scroll_bar").style.pixelTop>=(scrollarea_H-scrollbar_H)){  

$("scroll_bar").style.pixelTop=scrollarea_H-scrollbar_H; 
 } 
return false; 
   } 

 } 

document.onmousedown=dragit; 
document.onmouseup=new Function("drag=false;$('scroll_bar').style.background='#efefef'"); 
//--> 
 
 
 
 
   

 
 
<!-- 
var str="这个是用层做的滚动条,Powered by yexj00!"; 
str=str.split(""); 
for(i=0;i<str.length;i++){ 
document.write(str[i]+" "); 
 } 
//--> 
 
 

   
   
   
       
   
   
 

 
 
         

  [Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]