Forms >>> Checkbox Changer.


		<script 
		language="javascript"
		type="text/javascript">

		/* Visit http://www.yaldex.com/ 
		for full source code

		and get more free JavaScript, CSS and DHTML scripts! */

		<!-- Begin

		function 
		checkAll()
		{

		for
		(var 
		j =
		1; 
		j <=
		14; 
		j++)
		{

		box 
		=
		eval("document.checkboxform.C"
		+ 
		j);

		if
		(box.checked
		==
		false) 
		box.checked
		=
		true;

		   
		}

		}

		

		function 
		uncheckAll()
		{

		for
		(var 
		j =
		1; 
		j <=
		14; 
		j++)
		{

		box 
		=
		eval("document.checkboxform.C"
		+ 
		j);

		if
		(box.checked
		==
		true) 
		box.checked
		=
		false;

		   
		}

		}

		

		function 
		switchAll()
		{

		for
		(var 
		j =
		1; 
		j <=
		14; 
		j++)
		{

		box 
		=
		eval("document.checkboxform.C"
		+ 
		j);

		box.checked
		=
		!box.checked;

		   
		}

		}

		//  End -->

		</script>

		<form
		name=checkboxform>

		<input 
		type=checkbox
		name=C1
		checked>C1

		<input
		type=checkbox
		name=C2
		checked>C2

		<input
		type=checkbox
		name=C3
		checked>C3

		<input
		type=checkbox
		name=C4
		checked>C4

		<input
		type=checkbox
		name=C5
		checked>C5

		<input
		type=checkbox
		name=C6
		checked>C6

		<input
		type=checkbox
		name=C7
		checked>C7<br>

		<input
		type=checkbox
		name=C8
		checked>C8

		<input
		type=checkbox
		name=C9
		checked>C9

		<input
		type=checkbox
		name=C10
		checked>C10

		<input
		type=checkbox
		name=C11
		checked>C11

		<input
		type=checkbox
		name=C12
		checked>C12

		<input
		type=checkbox
		name=C13
		checked>C13

		<input
		type=checkbox
		name=C14
		checked>C14<br>

		<br>

		<input
		type=button
		value="Check 
		All" 
		onClick="checkAll()"><br>

		<input
		type=button
		value="Uncheck 
		All" 
		onClick="uncheckAll()"><br>

		<input
		type=button
		value="Switch 
		All" 
		onClick="switchAll()"><br>

		</form>