关于 带链接的图片循环显示问题，，应该是js哪里出了问题。。现在是图片可以循环播放，但是点击图片却始终进入canvas.html页面

Question

html：<div class="centered-1">    <a href="canvas.html"><img src="images/reading-1.jpg" id="adBanner-1" alt="ad Banner"></a></div>css: .centered-1{width:200px;height: 200px;} .centered-1  img{ width:100%; height: 100%;}.centered-1 a{display: block;}js代码：window.onload=initBannerLink;var thisLink=0;function initBannerLink(){    if(document.getElementById("adBanner-1").parentNode.tagName=="A")    {   document.getElementById("adBanner-1").parentNode.onClick=newLocation;    }    rotate_1();}function newLocation(){    document.write("fjskdjs");    var adURL=new Array("http://www.google.com","http://www.sun.com","http://www.baidu.com");    document.location.href=adURL[thisLink];    return false;}function rotate_1(){    var adimgs=new Array("images/reading-1.jpg","images/reading-2.jpg",            "images/reading-3.jpg");    thisLink++;    if(thisLink==adimgs.length)    {        thisLink=0;    }    document.getElementById("adBanner-1").src=adimgs[thisLink];    setTimeout(rotate_1,2*1000);}