QueryString = function()
{
	this.keys = new Array();
	this.values = new Array();
	
	var query = window.location.search.substring(1);
	var pairs = query.split("&");
	
	for (var count=0;count<pairs.length;count++)
	{
		var pos = pairs[count].indexOf('=');
		if (pos >= 0)
		{
			var argname		= pairs[count].substring(0,pos);
			var value		= pairs[count].substring(pos+1);
			this.keys[this.keys.length]		= argname;
			this.values[this.values.length]	= value;		
		}
	}	
}	

QueryString.prototype.getKey = function(key)
{
	var value = null;
	for (var count=0;count<this.keys.length;count++)
	{
		if (this.keys[count].toLowerCase()==key.toLowerCase())
		{
			value = this.values[count];
			break;
		}
	}
	return value;
}