Microsoft JScript runtime error: 'F_Value' is undefined i get ths error
suppose i select 2 items
i get alert for ist item but for second i get the above error
var list = document.getElementById('listbox1');
for (var i = 0; i <list.options.length; ++i)
{
if (list.options[i].selected)
{
alert(list.options[i].value);
F_Value = F_Value + "," + list.options[i].value;
}
}