what is the Problems with this regexes

I have name ( fname+lname) and email and i have their regexes but they are not validating

var  fnlnregex = /^[\w\/\s\.-]+$/;  //first name + last name   
var usremailregex = /^[@.\w]+$/;

if(!usremailregex.test($("#Eml").val())){
        flag = false;
        $("#Eml").attr('class','red');  
    }else{
        $("#Eml").attr('class','');
    }开发者_运维问答

But it is not validating the email field it is taking the following data as correct //if i enter only "abc" in the email field it is not taking as wrong

fnlnregex - this should not allow numbers but in my same if for name regex it is allowing . How do i correct the two

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/^[@.\w]+$/ means:

start of string - one or more of a combination of @, any character or word boundary - end of string

I must say that it's pretty useless. The . means any character which includes @ and \w already.

As for why abc matches - well, it matches beginning - any character - end.

What you're looking for is something along the lines of:

/^[a-z0-9]+@[a-z0-9]+\.[a-z]+$/i

which translates to:

beginning - one or more letters or digits - a @ - one or more letters or digits - a . - one or more letters - end.

The i means that it's case-insensitive.

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your usremailreg will never work to validate emails. It accepts anything that has at least ONE character that's a ., a @, or a-z0-9A-Z. so @@@@@@@@@ is perfectly valid.

Try this one on for size to validate RFC822-compliant addresses:

(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])

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usremailregex: if the string consists only of '@', '.', or word characters, allow it. That is valid for abc.

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In the first regex you're using the \w shorthand, which matches any word character, including numbers; you could try with:

/^[A-Za-z\/\s\.-]+$/

if you just want alphabetical characters.