Turn a document query string into a JavaScript object

parse_query_string.js

/**
 * Parse an HTTP query string into a JS object.
 */
var parseQueryString = function(query) {
    var uri    = query || document.location.href,
        params = {},
        args, i, pair, key, value;
    
    if (!uri) return params;
    
    args = uri.substring(uri.indexOf('?') + 1, uri.length).split('&');
    i    = args.length;
    
    if (i < 1) return params;
    
    while(i--) {
        pair  = args[i].split('=');
        key   = pair[0];
        value = pair[1];
        
        if (key && value) {
            params[key] = value;
        }
    }
    
    return params;
};