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图片自动切换

代码如下：

e_tplink[0]="http://www.makewing.com/lanren/";
e_tp[0]="imges/01.jpg";

e_tplink[1]="http://www.makewing.com/lanren/";
e_tp[1]="imges/02.jpg";

e_tplink[2]="http://www.makewing.com/lanren/";
e_tp[2]="imges/03.jpg";

e_tplink[3]="http://www.makewing.com/lanren/";
e_tp[3]="imges/04.jpg";
var currentimage=new Array();   
for (i=0;i<=3;i++){currentimage[i]=new Image();
      currentimage[i].src=e_tp[i];
         }
         function elady1_set(){   if (document.all)
         {      e_tprotator.filters.revealTrans.Transition=Math.floor(Math.random()*23);
               e_tprotator.filters.revealTrans.apply();   }
               }
               function elady1_playCo()
               {   if (document.all)      e_tprotator.filters.revealTrans.play()
               }function elady1_nextAd(){   if(adNum_elady1<e_tp.length-1)adNum_elady1++ ;
                     else adNum_elady1=0;
                        elady1_set();
                           document.images.e_tprotator.src=e_tp[adNum_elady1];
                              elady1_playCo();
                                 theTimer=setTimeout("elady1_nextAd()", 4000);}
                                 function elady1_linkurl(){   jumpUrl=e_tplink[adNum_elady1];
                                    jumpTarget='_blank';
                                       if (jumpUrl != ''){      if (jumpTarget != '')window.open(jumpUrl,jumpTarget);
                                             else location.href=jumpUrl;
                                                }}
function elady1_listMsg() 
{   status=e_tplink[adNum_elady1];
document.returnValue = true;}
document.write("<div id='elady1_divimg' style='position:relative'>");
document.write('<a onMouseOver="elady1_listMsg();return document.returnValue" href="javascript:elady1_linkurl()" target="_self">');
document.write('<img style="FILTER: revealTrans(duration=2,transition=20)" height=300 src="javascript:elady1_nextAd()" width=300 border=0 name=e_tprotator ></a>');
document.write("</div>");
</script>