要完成此效果把如下代码加入到区域中 <script language="JavaScript" type="text/javascript"> function lib_bwcheck(){ //Browsercheck (needed) this.ver=navigator.appVersion this.agent=navigator.userAgent this.dom=document.getElementById?1:0 this.opera5=this.agent.indexOf("Opera 5")>-1 this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom && !this.opera5)?1:0; this.ie6=(this.ver.indexOf("MSIE 6")>-1 && this.dom && !this.opera5)?1:0; this.ie4=(document.all && !this.dom && !this.opera5)?1:0; this.ie=this.ie4||this.ie5||this.ie6 this.mac=this.agent.indexOf("Mac")>-1 this.ns6=(this.dom && parseInt(this.ver) >= 5) ?1:0; this.ns4=(document.layers && !this.dom)?1:0; this.bw=(this.ie6 || this.ie5 || this.ie4 || this.ns4 || this.ns6 || this.opera5) return this } var bw=new lib_bwcheck() numImages=10 //How many images you have in your page loaderWidth=300 //The width of the loadbar currentImg=0 function lib_doc_size(){ this.x=0;this.x2=bw.ie && document.body.offsetWidth-20||innerWidth||0; this.y=0;this.y2=bw.ie && document.body.offsetHeight-5||innerHeight||0; if(!this.x2||!this.y2) return message('Document has no width or height') this.x50=this.x2/2;this.y50=this.y2/2; return this; } function lib_obj(obj,nest){ nest=(!nest) ? "":'document.'+nest+'.' this.evnt=bw.dom? document.getElementById(obj):bw.ie4?document.all[obj]:bw.ns4?eval(nest+"document.layers." +obj):0; this.css=bw.dom||bw.ie4?this.evnt.style:this.evnt; this.ref=this.css this.w=this.evnt.offsetWidth||this.css.clip.width|| this.ref.width||this.css.pixelWidth||0; return this } lib_obj.prototype.moveIt = function(x,y){ this.x=x;this.y=y; this.css.left=x;this.css.top=y } lib_obj.prototype.clipTo = function(t,r,b,l,setwidth){ this.ct=t; this.cr=r; this.cb=b; this.cl=l if(bw.ns4){ this.css.clip.top=t;this.css.clip.right=r this.css.clip.bottom=b;this.css.clip.left=l }else{ if(t<0)t=0;if(r<0)r=0;if(b<0)b=0;if(b<0)b=0 this.css.clip="rect("+t+","+r+","+b+","+l+")"; if(setwidth){this.css.pixelWidth=this.css.width=r; this.css.pixelHeight=this.css.height=b} } } var oLoad2 function startLoading(){ page=new lib_doc_size() oLoadCont=new lib_obj('divLoadCont') oLoad=new lib_obj('divLoad1','divLoadCont') oLoad2=new lib_obj('divLoad2','divLoadCont.document.divLoad1') oLoadText=new lib_obj('divLoadText','divLoadCont.document.divLoad1') oLoad.moveIt(page.x50-loaderWidth/2,page.y50-20) oLoadText.moveIt(loaderWidth/2 - oLoadText.w/2,10) oLoad.clipTo(0,loaderWidth,40,0,1) oLoad2.per = loaderWidth/numImages } function loadIt(ok){ currentImg++ if(oLoad2) oLoad2.clipTo(0,oLoad2.per*currentImg,40,0,1) if(!ok){ oLoadCont.css.visibility='hidden' oLoadCont=null; oLoad1=null; oLoad2=null; } } function loadIt_display(ok){ currentImg++ if(oLoad2) oLoad2.clipTo(0,oLoad2.per*currentImg,40,0,1) if(currentImg<=numImages) setTimeout("loadIt_display(1)",200) else{ oLoadCont.css.visibility='hidden' } } </script> <script> startLoading() //onload=loadIt; //- LEAVE THIS LINE WHILE TESTING. UNCOMMENT WHEN READY loadIt_display(1) //LEAVE THIS LINE WHILE TESTING. DELETE WHEN READY </script>