Regular Expression for Email in Javascript

Question

Hi,

I already have a regular Expression for checking the Email in javascript

 

/^([\w-+\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/

 

but i want something more in this regular expression. I want a condition which should not allow +@ together and -@ together.

 

Where can i add the similar thing