I am new in web designing. I have some probuelms in my website. Firstly That is not cross browser website and I want to make it. But I don't know how to do this. I have read some articals about this but have not got any help. Please tell me how I can make cross browser website. Secondaly I have another problem. When I have validate my website css file then I have got these errors 218 .box Property border-radius doesn't exist in CSS level 2.1 but exists in : 6px 6px 219 .box Property -moz-border-radius doesn't exist : 6px 6px 220 .box Property -webkit-border-radius doesn't exist : 6px 6px. But I don't know how to solve this also. Please tell me is anyone know about that.
There's no shorter answer.
The long answer is for cross browser compatibility for the list you've made will require a lot of extra effort and it's far too broad a topic to cover here.
The validation errors are simply occuring because the border-radius properties are CSS3 properties and do not exist in CSS 2.1
When you say it's not a cross-browser website, you will need to be more specific than that. However, I just took a look at the site in both firefox and IE7, and it looks pretty identical in both (except for a lack of rounded corners in IE).
Are there any specific problems in a specific browser that you know of?