如何使用jquery或javascript只允许文本框中的英文，数字和特殊字符？

I want to allow only English,numeric and special characters to be typed in my web page. i want to apply this thing using jquery or javascript. Actually my application is in 2 languages so for that i want to do this. I want to do the same thing with Arabic language too.. please help me. How can I do that?I want to allow only English,numeric and specia