open 动态修改img的onclick事件

 var imgsrc = document.getElementById("imgsrc").getElementsByTagName('img');

 imgsrc[0].style.cursor="hand";
 imgsrc[0].onclick = new Function( "openArticle('/RssCommServlet?catalogid=29')");
 imgsrc[1].style.cursor="hand";
 imgsrc[1].onclick = new Function( "openArticle('/RssCommServlet?catalogid=30')");
 imgsrc[2].style.cursor="hand";
 imgsrc[2].onclick = new Function( "openArticle('/RssCommServlet?catalogid=31')");