js 实现checkbox 全选
<%@ page contentType="text/html; charset=gb2312" language="java" %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312"><title>test</title></head><script language="javascript">function test(){alert('start..');var cb =document.frm.elements;for(var i=0;i<cb.length;i++){if(cb.type=='checkbox'){cb.checked=true;}}}</script><body><form action="" name="frm"><table align="center"><tr><td> <input type="checkbox" name="cb1"/>checkbox 1</td></tr><tr><td> <input type="checkbox" name="cb2"/>checkbox 2</td></tr><tr><td> <input type="checkbox" name="cb3"/>checkbox 3</td></tr><tr><td> <input type="button" name="cb3" value="Test" /></td></tr></table></form></body></html>
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