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));
		    }