selecting all items from select box

i have a select box that gets populated from a table in the database.
it contains names of the customers.
i want a check box or a radio button which when checked selects all the items (names) in the select box.

thanks in advance

 

Here is a javascript function that will do just that.

function SetAllCheckBoxes(FormName, FieldName, CheckValue)
{
	if(!document.forms[FormName])
		return;
	var objCheckBoxes = document.forms[FormName].elements[FieldName];
	if(!objCheckBoxes)
		return;
	var countCheckBoxes = objCheckBoxes.length;
	if(!countCheckBoxes)
		objCheckBoxes.checked = CheckValue;
	else
		// set the check value for all check boxes
		for(var i = 0; i < countCheckBoxes; i++)
	

Code (markup):

 

}

Code (markup):

forgot the }

 

thanks for your reply dgxshiny

but that cose is to select all check boxes but what i want is to select items in

select box. please clarify me if i am wrong.

 

Sorry, I was thinking checkbox.

Try this:

 

thank you very much