麻烦看下这段代码。为什么在firefox里点击超链接不跳转，而在IE中就跳转了。本人意愿是不跳转
html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"> <title>image gallery</title> <link rel="Stylesheet" href="styles/layout.css" type="text/css"/> <script type="text/javascript"> function showPic(whichpic) { imgSource = whichpic.getAttribute("href"); placeholder = document.getElementById("placeholder"); placeholder.setAttribute("src",imgSource); var text = whichpic.getAttribute("title"); var description = document.getElementById("description"); description.firstChild.nodeValue = text; //alert(description.childNodes[0].nodeValue); } function countBodyChildren() { var body_element = document.getElementsByTagName("body")[0]; nodeLength = body_element.childNodes.length; alert(body_element.nodeType);// for(i=0;i<nodeLength;i++)// {// alert(body_element.childNodes[i].nodeType);// } } //window.onload = countBodyChildren; </script></head><body> <h1>Snapshots</h1> <ul> <li> <a href="img/1.jpg" title="A fireworks display" onclick="return false;showPic(this);">Fireworks</a> </li> <li> <a href="img/2.jpg" title="A cup of black coffee" onclick="showPic(this);return false;">Coffee</a> </li> <li> <a href="img/3.jpg" title="A red,red rose" onclick="showPic(this);return false;">Rose</a> </li> <li> <a href="img/4.jpg" title="The famous clock" onclick="showPic(this);return false;">Big Ben</a> </li> </ul><br /><br /> <img id="placeholder" src="img/1.jpg" alt="my image gallery" width="400px" height="300px" /> <p id="description">Choose an image.</p> </body></html>