var request = {
QueryString : function(val) {
	var uri = window.location.search;
	var re = new RegExp("" +val+ "\=([^\&\?]*)", "ig");
	return ((uri.match(re))?(uri.match(re)[0].substr(val.length+1)):null);
},
QueryStrings : function() {
	var uri = window.location.search;
	var re = /\w*\=([^\&\?]*)/ig;
	var retval=[];
	while ((arr = re.exec(uri)) != null)
	retval.push(arr[0]);
	return retval;
},
setQuery : function(val1, val2) {
		var a = this.QueryStrings();
		var retval = "";
		var seted = false;
		var re = new RegExp("^" +val1+ "\=([^\&\?]*)$", "ig");
		for(var i=0; i<a.length; i++) {
		if (re.test(a[i])) {
		seted = true;
		a[i] = val1 +"="+ val2;
	}
}
retval = a.join("&");
return "?" +retval+ (seted ? "" : (retval ? "&" : "") +val1+ "=" +val2);
}
}