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; } 
	}
	
	function queryString(key){
		var page = new PageQuery(window.location.search); 
		return unescape(page.getValue(key)); 
	}