<input type="checkbox" name="sel_all" onclick ="check_all(this)" value = "Check All">
<input type="checkbox" name="sel" value="ddd">
<SCRIPT LANGUAGE="JavaScript">
<!--
function check_all(sel_all){
var sels = document.frm.sel;
for (var i =0; i < sels.length; i++){
sels[i].checked = sel_all.checked;
}
}
//-->
</SCRIPT>
<input type="checkbox" name="sel" value="ddd">
<SCRIPT LANGUAGE="JavaScript">
<!--
function check_all(sel_all){
var sels = document.frm.sel;
for (var i =0; i < sels.length; i++){
sels[i].checked = sel_all.checked;
}
}
//-->
</SCRIPT>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE></HEAD>
<SCRIPT LANGUAGE="JavaScript">
<!--
function check_all(obj){
var sels =document.getElementsByName("sel");
for (var i =0; i < sels.length; i++)
{
sels[i].checked=document.all.sel_all.checked;
}
}
//-->
</SCRIPT>
<BODY>
<form id="frm">
<input type="checkbox" name="sel_all" onclick ="check_all(this)" value = "Check All">全部选中
<input type="checkbox" name="sel" value="ddd">
<input type="checkbox" name="sel" value="ddd">
<input type="checkbox" name="sel" value="ddd"></form>
</BODY>
</HTML>
<!--
function select_all()
{
for (var i=0;i<document.all.length;i++)
{
if (document.all(i).type == 'checkbox' || document.all(i).type !='undefined');
document.all(i).checked = 'yes';
}
}
-->
</script><input type=checkbox>
<input type=checkbox>
<input type=checkbox>
<input type=checkbox>
<input type=checkbox>
<input type=checkbox>
<input type=checkbox>
<input type=checkbox>
<input type=checkbox>
<input type=checkbox>
<input type=checkbox>
<p>
<input type=button value='select all' onclick='select_all();'>
function selectAll(bot,check){
var checks=document.getElementsByName(check);
for(i=0;i<checks.length;i++){
if(checks[i].checked==false && bot.onclick)
checks[i].checked=true;
}
}
//复选框取消全选
function cancelSelect(bot,check){
var checks=document.getElementsByName(check);
for(i=0;i<checks.length;i++){
if(checks[i].checked==true && bot.onclick)
checks[i].checked=false;
}
}
<input type="checkbox" name="sel" value="ddd">
<input type="checkbox" name="sel" value="ddd">
<input type="checkbox" name="sel" value="ddd">
<input type="button" value="全选" onclick = selectAll(this,'sel');
<input type="button" value="取消全选" onclick = cancelSelect(this,'sel');
给楼主,这个是按扭哦,呵呵,记得给分,