function queryString(key)
         {
            var page = new PageQuery(window.location.search);
            return unescape(page.getValue(key));
        }
         function PageQuery(q) 
         {
            if(q.length > 1) this.q = q.substring(1, q.length);
            else this.q = null;
            this.keyValuePairs = new Array();
            if(q) {
            for(var i=0; i < this.q.split("&").length; i++) {
            this.keyValuePairs[i] = this.q.split("&")[i];
            }
            }
            this.getKeyValuePairs = function() { return this.keyValuePairs; }
            this.getValue = function(s) {
            for(var j=0; j < this.keyValuePairs.length; j++) {
            if(this.keyValuePairs[j].split("=")[0] == s)
            return this.keyValuePairs[j].split("=")[1];
            }
            return false;
            }
            this.getParameters = function() {
            var a = new Array(this.getLength());
            for(var j=0; j < this.keyValuePairs.length; j++) {
            a[j] = this.keyValuePairs[j].split("=")[0];
            }
            return a;
            }
            this.getLength = function() { return this.keyValuePairs.length; }
            }