function QueryString(key)
{
    var value = null;
    for (var i=0;i<QueryString.keys.length;i++)
	{
	    if (QueryString.keys[i]==key)
		{
		    value = QueryString.values[i];
		    break;
		}
	}
    return value;
}
QueryString.keys = new Array();
QueryString.values = new Array();

function QueryString_Parse()
{
    var query = window.location.search.substring(1);
    var pairs = query.split("&");

    for (var i=0;i<pairs.length;i++)
	{
	    var pos = pairs[i].indexOf('=');
	    if (pos >= 0)
		{
		    var argname = pairs[i].substring(0,pos);
		    var value = pairs[i].substring(pos+1);
		    QueryString.keys[QueryString.keys.length] = argname;
		    QueryString.values[QueryString.values.length] = value;
		}
	}
}