Forms >>> Controlled Boxes.


		<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 
		checkChoice(field, 
		i)
		{

		if
		(i
		==
		0)
		{
		// "All" checkbox selected.

		if
		(field[0].checked
		==
		true)
		{

		for
		(i
		=
		1; 
		i < 
		field.length; 
		i++)

		field[i].checked
		=
		false;

		   
		}

		}

		else 
		{ 
		// A checkbox other than "Any" 
		selected.

		if
		(field[i].checked
		==
		true)
		{

		field[0].checked
		=
		false;

		      
		}

		   
		}

		}

		//  End -->

		</script>

		Please select your favorite class(es):

		<form
		name=pickform>

		<table>

		<tr><td>

		<input
		type=checkbox
		name=classes
		value="*"
		onclick="checkChoice(document.pickform.classes, 
		0)" 
		checked>All

		<br>

		<input
		type=checkbox
		name=classes
		value="science"
		onclick="checkChoice(document.pickform.classes, 
		1)">Science

		<br>

		<input
		type=checkbox
		name=classes
		value="math"
		onclick="checkChoice(document.pickform.classes, 
		2)">Math

		<br>

		<input
		type=checkbox
		name=classes
		value="english"
		onclick="checkChoice(document.pickform.classes, 
		3)">English

		<br>

		<input
		type=checkbox
		name=classes
		value="history"
		onclick="checkChoice(document.pickform.classes, 
		4)">Histroy

		<br>

		<input
		type=checkbox
		name=classes
		value="other"
		onclick="checkChoice(document.pickform.classes, 
		5)">Other

		</td></tr>

		</table>

		</form>