Please enter a valid URL. Protocol is required (http://, https:// or ftp://)

1.去js\prototype 打开 “validation.js”. 

2.注释掉此行验证 [’validate-url’, ‘Please enter a valid URL. Protocol is required (http://, https:// or ftp://)’, function (v) {
return Validation.get(’IsEmpty’).test(v) || /^(http|https|ftp):\/\/(([A-Z0-9][A-Z0-9_-]*)(\.[A-Z0-9][A-Z0-9_-]*)+)(:(\d+))?\/?/i.test(v)
}]

3.成功安装后去掉些行验证

 

 

参考：http://www.magentocommerce.com/boards/viewthread/214962/