select all multiple-select box

[grangey77]

i would like to select all cases in a multiple select box by checking a check
box.

does anyone have any ideas?

thanks

 

[grangey77]

I have managed to create a solution to the problem.

You must call a function from an onclick function (e.g. onclick=
"selectall([name of selectbox])" of a checkbox. then you need to build a
function much like the one below:

function selectall(chosen)
{
var selObj = document.getElementById(chosen);
for (var i = 0; i < selObj.options.length; i++)
{
selObj.options.selected = true;
}
}