Check and Uncheck All
Written by 21 August 2012
The button will check or uncheck all of the check boxes.
Code Snippet:
<!-- this script is provided by https://www.javascriptfreecode.com coded by: Kerixa Inc. -->
<HEAD>
<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 "Uncheck All"; }
else {
for (i = 0; i < field.length; i++) {
field[i].checked = false; }
checkflag = "false";
return "Check All"; }
}
// End -->
</script>
</HEAD>
<!-- CONTINUE -->
<BODY>
<center>
<form name=myform action="" method=post>
<table>
<tr><td>
<b>Your Favorite Scripts & Languages</b><br>
<input type=checkbox name=list value="1">Java<br>
<input type=checkbox name=list value="2">JavaScript<br>
<input type=checkbox name=list value="3">ASP<br>
<input type=checkbox name=list value="4">HTML<br>
<input type=checkbox name=list value="5">SQL<br>
<br>
<input type=button value="Check All" onClick="this.value=check(this.form.list)">
</td></tr>
</table>
</form>
</center>
<br /><a target='_blank' href='https://www.javascriptfreecode.com' style='font-size: 8pt; text-decoration: none'>JavaScript Best Codes</a>
Example:
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