按鈕－全選複選框

1..................

<script>

function sel()

{

o=document.getElementsByName("chkbox")

for(i=0;i<o.length;i++)

o[i].checked=event.srcElement.checked

}

</script>

<input type="checkbox" onclick='sel()'>圈選<br>

<input type="checkbox" name="chkbox"><input type="checkbox" name="chkbox"><input type="checkbox" name="chkbox"><input type="checkbox" name="chkbox"><input type="checkbox" name="chkbox">

2...................

<input type='checkbox' name='Chk1' id='chk_fun' value='1' >

<input type='checkbox' name='Chk2' id='chk_fun' value='1' >

<input type='checkbox' name='Chk3' id='chk_fun' value='1' >

<input type='checkbox' name='Chk4' id='chk_fun' value='1' >

<SCRIPT LANGUAGE="JavaScript">

<!-- Begin

var checkflag = "false";

function check(field) {

if (checkflag == "false") {

for (i = 0; i < field.length; i++) {

field[i].checked = true;}

checkflag = "true";

return "取消全選"; }

else {

for (i = 0; i < field.length; i++) {

field[i].checked = false; }

checkflag = "false";

return "再全選"; }

}

// End -->

</script>

<input type=button value="全選" onClick="this.value=check(document.all.chk_fun)">