function reload(form) { 
var val=form.maincatid.options[form.maincatid.options.selectedIndex].value; 
self.location='shop.php?action=addproduct&maincatid=' + val ; 
}
function reload2(form) {
var val=form.maincatid.options[form.maincatid.options.selectedIndex].value; 
var val2=form.subcatid.options[form.subcatid.options.selectedIndex].value; 
self.location='shop.php?action=addproduct&maincatid=' + val + '&subcatid=' + val2;
}