求帮忙改改javascript代码！！！急急急急急！！谢谢

来源：百度知道 编辑：UC知道 时间：2024/06/30 09:58:05
要求实现：全部选中和全部清除的功能。谢谢！
<html><head>
<script type=text/javascript>

</script></HEAD>
<form action="##" method="post" id=getElementByID>
<table border="0" width=500>
<tr><td width="40%"> <input type="checkbox" id="qq" value="ON" >qq

<tr><td width="40%"> <input type="checkbox" id="dd" value="ON" >dd

<tr><td width="40%"> <input type="checkbox" id="gg" value="ON" >gg

<tr><td width="40%"> <input type="checkbox" id="uu" value="ON" >uu

</table>
<br>
<input type="button" value=" 全部选中 " id="selectAll" onClick="SelectAll()" >
<input

<html><head>
<script type=text/javascript>
function checkall2(index)
{
var name = "qq";
var aa = document.getElementsByName(name);
var notAllChecked = false;

for(var j=0;j<aa.length;j++)
{
aa[j].checked = true;
}

}

function reverse2(index)
{
var name = "qq"+index;
var aa = document.getElementsByName(name);
for (var i=0; i<aa.length; i++)
aa[i].checked = !aa[i].checked;
}

function checkall(form)
{
for (var i=0;i<form.elements.length;i++)
{
var e = form.elements[i];
if (e.Name != "allcheckbox"&&e.disabled==false)
e.checked =true;
}
}

function contrasel(form)
{
for (var i=0;i<form.elements.length;i++)
{
var e=form.elements[i];
if (e.name!='chkall')
e.checked=!e.