c# - javascript validation for email format accepting incorrect email format @abcd.com.gmail,

I have to do validation for Email format, I am using the CODE below line to restrict Special Characters.

onkeypress="return AlphaNumericBox(event,this,'@._);"

But now the Problem is I don have any proper validation for the exact format for example its also accepting text like " @abcd.com.gmail,.. " Is there any javascript validation for this?
any idea?

Thanks in advance.

Answer

function CheckEmail(address){
    address=address.replace(/(^\s*)|(\s*$)/g, "");
    var reg=/([\w._-])+@([\w_-])+(\.([\w_-])+){1,2}/;

    var matcharr=reg.exec(address);
    if(matcharr!=null){
        if(matcharr[0].length==address.length){
            return true;
        }
        return false;
    }
    return false;
}


eg:
var sVal=" t.st@gmail.com.cn ";
var sVal2=" t.st@gmail.com.cn.abc ";
console.log(CheckEmail("name@server.com"));    //outpus true
console.log(CheckEmail("@server.com"));   //outpus false