function submitform() {
    var searchterm = document.searchform.q.value;
     if (IsNumeric(searchterm) == true && searchterm.length > 4) {
        document.searchform.method = 'post';
        document.searchform.action = 'http://map.ais.ucla.edu/go/' + searchterm;
    } else {
        document.searchform.action = 'http://gsa.search.ucla.edu/search';
    }
    document.searchform.submit();
}

function IsNumeric(strString) {
    var strValidChars = "0123456789.-";
    var strChar;

    if (strString.length == 0)
        return false;

    for (i = 0; i < strString.length; i++) {
        strChar = strString.charAt(i);
        if (strValidChars.indexOf(strChar) == -1)
            return false;
    }
    return true;
}