function checkEnter(e)
{
    var characterCode;

    if(e && e.which)
    {
        //NN4
        characterCode = e.which;
    }
    else
    {
        characterCode = e.keyCode;
    }

    if(characterCode == 13)
    {
        return(true);
    }
    else
    {
        return(false);
    }
}