obj2URL

gistfile1.js

function obj2URL(obj, url)
{
    url = url || '';
    var parts = [],
        push  = function(key, val){
            parts.push(encodeURIComponent(key) + '=' + encodeURIComponent(val));
        },
        qs;

    for (var key in obj) {
        if (obj.hasOwnProperty(key)) {
            var val = obj[key];
            if (val instanceof Array) {
                for (var i=0, l=val.length; i<l; i++) { push(key, val[i]); }
            } else {
                push(key, val);
            }
        }
    }
    qs = (/\?/.test(url) ? '&' : '?') + parts.join('&');
    
    return url + qs;
}