Email Validation

Function that validates email.

function isValidEmail(email:String):Boolean {   
 var emailExp:RegExp = /^[a-z][\w.-]+@\w[\w.-]+\.[\w.-]*[a-z][a-z]$/i;           
    return emailExp.test(email);     
 } 

trace(isValidEmail("admin@domain.com")); //Outputs true
trace(isValidEmail("admin.@.com")); //Outputs false