Improving shopping cart fanctions

Thanks for visiting. Here we want to improve shopping cart functionality by making small task as below. We estimate the task as 3 hours work for php, java expert. Please confirm the brief detail and conditions as below. Feel free to ask. --------------------------------------- Condition --------------------------------------- Only access through online file manager ( ajaxplorer ) is available. ( no ftp ) We only allow you to access limited file. We require your ip address to list in htaccess No database access --------------------------------------- Task Detail --------------------------------------- shopping cart: we want to block and alert message when buyer tries to proceed check out under following circumstances on shopping cart page 1. items are from more than 2 different vendors 2. item has 0 quantity of its latest data 3. unable to hack References: item data structure in cart $sCartItem = $iVendorId . '_' . $iModuleId . "_" . $iItemId . "_" . $iItemCount; define item’s the latest quantity $itemQuantity = SELECT stock_num FROM store_product_files WHERE id=$iItemId WRITTEN CODE [login to view URL] (not working) $('#items_from___vendor_id__').submit(function() { alert('Handler for .submit() called.'); return false; }); function checkvendors() { var values; var tmpvender=0; $('.pmt-item input[@type=checkbox]:checked').each(function(){ var str=$(this).attr('value').split('_'); var vendor_id=str[0]; if(tmpvender >0 && vendor_id >0){ if(tmpvender != vendor_id){ //[login to view URL] ="[login to view URL]"; alert("<bx_text:_payment_err_one_vendor />"); $("#items_from___vendor_id__").attr('action',"cart"); return false; } } tmpvender=vendor_id; $('#vendor_id').attr("value",tmpvender); //alert($(this).attr('value').substring(0, 1)); }); if(tmpvender ==0){ alert("<bx_text:_payment_err_one_vendor />"); $("#items_from___vendor_id__").attr('action',"cart"); return false; } //[login to view URL]() }