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特點：

1.圖片預(yù)載入，載入后再顯示。意圖一次呈現(xiàn)，不會讓一塊一塊下載破壞你的頁面，絕佳的用戶體驗，顛覆傳統(tǒng)的瀏覽器呈現(xiàn)圖片的處理方式（需要后續(xù)函數(shù)支持）。
2.不會因載入圖片造成腳本暫停假死，完全另一線程進行。不影響主程序流程。
3.提供及時的反饋，包括兩方面的內(nèi)容：1.正在載入什么圖片 2.當前的百分數(shù)進度。大大提高留住用戶眼球的概率，不會讓用戶因為苦等而離開。
4.容錯支持，即使某個圖片沒有成功下載，也可以設(shè)置超時時間以便處理下一個圖片。
5.多變的參數(shù)類型，盡最大可能方便使用。

// save this as "image_loader.js"

//-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-//
/*
  ImageLoader, Version 1.1, JavaScript
  (c) 2006 Christian An <anchangsi@gmail.com>

  With copyright not modified, you can use this program freely.
*/
//-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-//

function ImageLoader(className,Options){
    this._ImageLoadStack = null;
    this._currrentLoading = "";
    this._FinalRun = false;
    this.numLoaded = 0;
    this.ClassName = className;
    
    if(typeof(Options)=="undefined") Options = {};
    
    if(isNaN(Options.Timeout) || Options.Timeout < 0 ||  Options.Timeout >100000){
        this.EnableTimeout = false;
    }else {
        this.EnableTimeout = true;
        this.Timeout = Options.Timeout;
    }
    
    if(typeof(Options.func)=="undefined"){
        this.AfterFunction = null;
    }else{
        this.AfterFunction = Options.func;
    }
    
    if(typeof(Options.display)=="undefined"){
        this.disDiv = null;
    }else if(typeof(Options.display)=="string"){
        this.disDiv = document.getElementById(Options.display);
    }else if(typeof(Options.display)=="object"){
        this.disDiv = Options.display;
    }else{
        this.disDiv = null;
    }

    if(typeof(Options.process)=="undefined"){
        this.procDiv = null;
    }else if(typeof(Options.process)=="string"){
        this.procDiv = document.getElementById(Options.process);
    }else if(typeof(Options.process)=="object"){
        this.procDiv = Options.process;
    }else{
        this.procDiv = null;
    }

    
    if(typeof(document.imageArray)=="undefined") document.imageArray = new Array();
    
    this.Load = function(){
        var args = this.Load.arguments;
        if(args.length!=0){
            this._ImageLoadStack = new Array();
            for(i=0; i<args.length; i++){
                if(args[i].indexOf("#")!=0){
                    this._ImageLoadStack.push(args[i]);
                }
            }

        }else if(this._ImageLoadStack == null){
            this._runFinal();
        }
        this.numTotal = this._ImageLoadStack.length;
        this._LoadAImage();
    }
    
    this._LoadAImage = function(){
        if(this._ImageLoadStack.length!=0){
            var sURL = this._ImageLoadStack.shift();
            if(this.disDiv!=null) this.disDiv.innerHTML = sURL;
            _currrentLoading = sURL;
        
            
            var j = document.imageArray.length;
            document.imageArray[j] = document.createElement("IMG");
            document.imageArray[j].Owner = this;
            
            document.imageArray[j].onload = function(){
                this.Owner._LoadAImage();
                this.onload = null;
            }
            document.imageArray[j].onerror = function(){
                this.Owner._LoadAImage();
                this.onload = null;
            }
            
            if(this.EnableTimeout){
                window.setTimeout("if(_currrentLoading==\""+sURL+"\"){"+this.ClassName+"._LoadAImage()}",this.Timeout);
            }
    
            document.imageArray[j++].src = sURL;
                if(this.procDiv!=null){
                this.numLoaded++;
                var percentage = Math.floor(this.numLoaded * 100 / this.numTotal);
                this.procDiv.innerHTML = percentage;
            }

        }else{
            this._runFinal();
        }

    }
    this._runFinal = function(){
            if(this._FinalRun == false){
                this._FinalRun = true;
                
                if(typeof(this.AfterFunction)=="function"){
                    this.AfterFunction();
                }else if(typeof(this.AfterFunction)=="string"){
                    if (window.execScript){
                        window.execScript(this.AfterFunction);
                    }else{
                        window.eval(this.AfterFunction);
                    }
                }
            }
    }
    this.setLoadImages = function(imageArray){
        if(typeof(imageArray)!="object") return;
        this._ImageLoadStack = imageArray;
    }

}

出處：藍色理想
責任編輯：moby

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