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)); 
    }

    function displayItem(key)
    {
        if(queryString(key)=='false') 
            return -1;
        else
            return queryString(key);
    }