var str = "";
var codeAry = new Array(0,1,2,3,4,5,6,7,8,9);

function p(ev)
{
    if(ev.keyCode == 13 && str === "1903")
        document.location = "Scripts/update_events.php";
    else if(ev.keyCode == 13)
        str = "";    
    else
        str += getChar(ev.keyCode);
}

function getChar(code)
{
    return  code >= 48 || code <= 57 ? codeAry[code - 48] : "";
}