<div style="background: url('http://screenprint2007.cpp114.com/UserFiles/20070412155452218.gif') no-repeat;text-align:center;width:256px;height:18px;position:absolute;top:110;left:10;font-size:13px">
<div id="proc" style="background: url('http://screenprint2007.cpp114.com/UserFiles/20070412155424937.gif');position:absolute;top:0;left:0;width:0px;height:18px;font-size:13px"></div>
<div style="position:absolute;top:2;left:0;width:256px;height:18px;text-align:center;font-size:13px;background:transparent">&nbsp;</div>
</div>
<br><br><br><br><br><br>
<input type="button" value="start" onclick="processBar.changeMode();if(processBar.isMoving){this.value='Stop';}else{this.value='Start';}">
<script>
document.execCommand("BackgroundImageCache",false,true);
function ProcessBar(obj){
      this.isMoving = false;
      this.maxLength = parseInt(obj.parentNode.style.width.replace("px",""));
      this.nowLength = parseInt(obj.style.width.replace("px",""));
      this.moveInterval = 100;
      this.moveRange = 1;
      this.timer;
      this.obj = obj;
      ProcessBar.nowObj = this;
      this.changeMode = function(){
     this.isMoving = !this.isMoving;
 
     if(this.isMoving){
      this.timer = window.setInterval(ProcessBar.nowObj.moving, this.moveInterval);
     }else{
      window.clearInterval(this.timer);
     }
      }
      this.moving = function(){
           ProcessBar.nowObj.nowLength += ProcessBar.nowObj.moveRange;
     ProcessBar.nowObj.obj.style.width = ProcessBar.nowObj.nowLength;
     ProcessBar.nowObj.obj.parentNode.lastChild.firstChild.data = Math.ceil((ProcessBar.nowObj.nowLength/ProcessBar.nowObj.maxLength)*100) + "%";
     if(ProcessBar.nowObj.nowLength >= ProcessBar.nowObj.maxLength){
      window.clearInterval(ProcessBar.nowObj.timer);
      ProcessBar.nowObj.obj.parentNode.lastChild.firstChild.data = "Complete!";
     }
      }
  
}
var processBar = new ProcessBar(proc);
</script>