email validation

email validation.js

	isEmail: function(email) {
	    var splitted = email.match("^(.+)@(.+)$");
	    if (splitted == null) return false;
	    if (splitted[1] != null)
	    {
	        var regexp_user = /^\"?[\w-_\.]*\"?$/;
	        if (splitted[1].match(regexp_user) == null) return false;
	    }
	    if (splitted[2] != null)
	    {
	        var regexp_domain = /^[\w-\.]*\.[A-Za-z]{2,4}$/;
	        if (splitted[2].match(regexp_domain) == null)
	        {
	            var regexp_ip = /^\[\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\]$/;
	            if (splitted[2].match(regexp_ip) == null) return false;
	        } // if
	        return true;
	    }
	    return false;
	},