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一个已封装好的漂亮进度条

　　本文标签：一个已封装好的漂亮进度条

<body> 
<input type="button" value="start" onclick="processBar.changeMode();if(processBar.isMoving){this.value=Stop;}else{this.value=Start;}"> 
</body> 
<script> 
document.execCommand("BackgroundImageCache",false,true);

function ProcessBar(){ 
   this.width = 256; 
   this.height = 18; 
   this.top = 0; 
   this.left = 0; 
   this.backImg = "process_back.gif"; 
   this.foreImg = "process.gif"; 
   this.backDiv = document.createElement("div"); 
   this.foreDiv = document.createElement("div"); 
   this.fontDiv = document.createElement("div");

this.isMoving = false; 
   this.nowLength = 0; 
   this.moveInterval = 100; 
   this.moveRange = 1; 
   this.timer;

ProcessBar.nowObj = this;

this.init = function(){ 
        this.foreDiv.style.backgroundImage = "url(" + this.foreImg + ")"; 
        this.foreDiv.style.backgroundRepeat = "no-repeat"; 
        this.foreDiv.style.position = "absolute"; 
        this.foreDiv.style.width = this.nowLength; 
        this.foreDiv.style.height = this.height; 
        this.foreDiv.style.top = 0; 
        this.foreDiv.style.left = 0; 
         
        this.fontDiv.style.background = "transparent"; 
        this.fontDiv.style.position = "absolute"; 
        this.fontDiv.style.width = this.width; 
        this.fontDiv.style.height = this.height; 
        this.fontDiv.style.top = 2; 
        this.fontDiv.style.left = 0; 
        this.fontDiv.style.textAlign = "center"; 
        this.fontDiv.style.fontSize = "13px"; 
        this.fontDiv.appendChild(document.createTextNode(" "));

this.backDiv.style.backgroundImage = "url(" + this.backImg + ")"; 
        this.backDiv.style.backgroundRepeat = "no-repeat"; 
        this.backDiv.style.position = "absolute"; 
        this.backDiv.style.width = this.width; 
        this.backDiv.style.height = this.height; 
        this.backDiv.style.top = this.top; 
        this.backDiv.style.left = this.left;

this.backDiv.appendChild(this.foreDiv); 
        this.backDiv.appendChild(this.fontDiv);

document.body.appendChild(this.backDiv); 
   }

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.foreDiv.style.width = ProcessBar.nowObj.nowLength;

ProcessBar.nowObj.fontDiv.firstChild.data = Math.ceil((ProcessBar.nowObj.nowLength/ProcessBar.nowObj.width)*100) + "%";

if(ProcessBar.nowObj.nowLength >= ProcessBar.nowObj.width){ 
            window.clearInterval(ProcessBar.nowObj.timer); 
            ProcessBar.nowObj.fontDiv.firstChild.data = "Complete!"; 
        } 
   }

}

var processBar = new ProcessBar(); 
processBar.width=327 
processBar.backImg = "/upload/2007415102319929.jpg"; processBar.foreImg = "/upload/2007415102319777.jpg"; processBar.top = 100; 
processBar.left = 20; 
processBar.init(); 
</script>

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