String.prototype.trim = function() {
    return this.replace(/^\s+|\s+$/g, "");
}

function qryPars() {
    var query = window.location.search.substring(1);
    if (query == "")
        return null;

    var qsParm = new Array();
    var parms = query.split('&');
    for (var i = 0; i < parms.length; i++) {
        var pos = parms[i].indexOf('=');
        if (pos > 0) {
            var key = parms[i].substring(0, pos);
            var val = parms[i].substring(pos + 1);
            qsParm[key] = val;
        }
    }
    return qsParm;
}