Javascript test function strange behavior

Question

Hello All,

I found out the javascript test function has a strange behaviour in my code.

1. I defined a match string variable in the first line of my widget.

var emailPatt=/@(tomtom|stream).com/ig;

1. And then i use it in my function

 var me=this;

    alert(emailPatt.test(eo.data.username));

if(emailPatt.test(eo.data.username)) //Search the regualr expres between string { alert("test works"); RightNow.Event.fire("evt_loginFormSubmitRequest", eo); new YAHOO.util.Anim("rn_" + this.instanceID + "Content", { opacity: { to: 0 } }, 0.5, YAHOO.util.Easing.easeOut).animate(); YAHOO.util.Dom.addClass("rn" + this.instanceID, 'rn_ContentLoading');

       //since this form is submitted by script, force ie to do auto_complete
        if(YAHOO.env.ua.ie > 0)
        {
        if(window.external && "AutoCompleteSaveForm" in window.external)
        {
            var form = document.getElementById("rn_" + this.instanceID + "_Form");
            if(form)
            window.external.AutoCompleteSaveForm(form);
        }
        }
        return false;
    }

    else if(!emailPatt.test(eo.data.username))
    {
       alert(emailPatt.test(eo.data.username));
       // alert ("not tomtom email address");
        me._onLoginResponse("evt_loginFormSubmitResponse", [{
        w_id : eo.w_id,
        result : 0,
        message : RightNow.Interface.getMessage('EMAIL_IS_NOT_VALID_MSG')
        }]);
    }

    },

So, the funny thing is here. The first alert(emailPatt.test(eo.data.username)); return true, the if(emailPatt.test(eo.data.username)) //Search the regualr expres between string return false,

The else if section , return true.

Anyone knows why it happens like that.

Thank you

Regards, Qing