复选框--全选/全不选/反选。简易版
调用方式：
<a href="javascript:selectchange('myform','love');">反选</a>
第一个参数为表单名，第二个参数为复选框name
1. [代码][JavaScript]代码
<!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=utf-8">
<meta name="description" content="webpage">
<meta name="keywords" content="kalcaddle">
<meta name="author" content="kalcaddle.">
<title>test</title>
</head>
<script language="Javascript">
function selectall(form_name,id_name) //全选
{
obj=eval("document."+form_name+"."+id_name);
num=obj.length;
for (var i=0; i<num; i++)
{
obj[i].checked=true;
}
}
function unselectall(form_name,id_name) //全不选
{
obj=eval("document."+form_name+"."+id_name);
num=obj.length;
for (var i=0; i<num; i++)
{
obj[i].checked=false;
}
}
function selectchange(form_name,id_name) //反选
{ http://www.huiyi8.com/tupian/
obj=eval("document."+form_name+"."+id_name);
num=obj.length;
for (var i=0; i<num; i++)
{ 高清图片
if(obj[i].checked==true)
{obj[i].checked=false}
else
{obj[i].checked=true;}
}
}
</script>
<body>
<form method=post action="" name="myform">
下棋<input type="checkbox" name="love" value="1"/>
看书<input type="checkbox" name="love" value="2"/>
听音乐<input type="checkbox" name="love" value="3"/>
看电影<input type="checkbox" name="love" value="4"/>
游戏<input type="checkbox" name="love" value="5"/>
<a href="javascript:selectall('myform','love');">全选</a>
<a href="javascript:unselectall('myform','love');">全不选</a>
<a href="javascript:selectchange('myform','love');">反选</a>
<br/>
</form>
</body>
</html>
