How to select all options of a ListBox?

[shvetak]

Hi,

I have a listbox control. I want to to select all its options when a checkbox is clicked. How to do it?

[glenngv]

objSelect = document.yourformname.yourselectname;
for (var i=0;i<objSelect.options.length;i++){
objSelect.options[i].selected=true;
}

of course in your select tag you should add multiple attribute

<select name="..." multiple>
...
</select>

[shvetak]

My code is something like this :

function CheckAll()
{

var iCtr;
iCtr = document.SalesP.cmbSales.options.length;
for(var i=0; i<iCtr; i++)
{
document.SalesP.cmbSales.options[i].selected=true;
}
}

And only the last option comes selected.

[shvetak]

..And the select also has the Multiple attribute set.

[glenngv]

as i said you should add multiple in the select tag to allow multiple select