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IE Firefox 都支持的checkbox全选（无表单）
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<TR bgcolor="#cccccc">
<td align="center" width="50"><b>全选</b><input type="checkbox" onClick="setsel(this);" name="aaa" id="chkall"></td>
</TR>
<TR bgcolor="#cccccc">
<td><input type="checkbox" name="picid[]" id="picid" value="1"></td>
<td><input type="checkbox" name="picid[]" id="picid" value="2"></td>
<td><input type="checkbox" name="picid[]" id="picid" value="3"></td>
<td><input type="checkbox" name="picid[]" id="picid" value="4"></td>
</tr>
<Script Language="JavaScript">
function setsel(obj){
var chkall= document.getElementById("chkall");
var chkother= document.getElementsByTagName("input");
for (var i=0;i<chkother.length;i++)
{
if( chkother.type=='checkbox')
{
if(chkall.checked==true)
{
chkother.checked=chkall.checked;
}else
{
chkother.checked="";
}
}
}
}
</Script>
<td align="center" width="50"><b>全选</b><input type="checkbox" onClick="setsel(this);" name="aaa" id="chkall"></td>
</TR>
<TR bgcolor="#cccccc">
<td><input type="checkbox" name="picid[]" id="picid" value="1"></td>
<td><input type="checkbox" name="picid[]" id="picid" value="2"></td>
<td><input type="checkbox" name="picid[]" id="picid" value="3"></td>
<td><input type="checkbox" name="picid[]" id="picid" value="4"></td>
</tr>
<Script Language="JavaScript">
function setsel(obj){
var chkall= document.getElementById("chkall");
var chkother= document.getElementsByTagName("input");
for (var i=0;i<chkother.length;i++)
{
if( chkother.type=='checkbox')
{
if(chkall.checked==true)
{
chkother.checked=chkall.checked;
}else
{
chkother.checked="";
}
}
}
}
</Script>