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