下面是小图,点一下上面就会出现大图 http://bbs.blueidea.com/thread-2846567-1-1.html <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>无标题文档</title> <style type="text/css"> img{}{ cursor:pointer} #big img{}{ width:100px; height:100px;} </style> </head> <body> <script type="text/javascript"> function change(a){ var bigpic = document.getElementById("bigpic"); if (a ==1){bigpic.setAttribute("src","http://www.chenbincb.com.cn/cnblogs/images/smile.gif")} if (a ==2){bigpic.setAttribute("src","http://www.chenbincb.com.cn/cnblogs/images/frown.gif")} if (a ==3){bigpic.setAttribute("src","http://www.chenbincb.com.cn/cnblogs/images/tongue.gif")} } </script> <div id="big"> <img src="http://www.chenbincb.com.cn/cnblogs/images/smile.gif" alt="" id="bigpic"> </div> <img src="http://www.chenbincb.com.cn/cnblogs/images/smile.gif" alt="" onclick="change(1)"> <img src="http://www.chenbincb.com.cn/cnblogs/images/frown.gif" alt="" onclick="change(2)"> <img src="http://www.chenbincb.com.cn/cnblogs/images/tongue.gif" alt="" onclick="change(3)"> </body> </html>