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));
}