/*
	This function parses comma-separated name-value pairs from the URL.
	Lookup a parameter by name (case insensitive) and return its value.
*/
function getParameter(name)
{
	var query = location.search.substring(1);
	var pairs = query.split("&");
	for (var i = 0; i < pairs.length; i++)
	{
		var pos = pairs[i].indexOf('=');
		if (pos == -1)
		{
			continue;
		}
		var argname = pairs[i].substring(0,pos);
		var value = pairs[i].substring(pos+1);
		if (name.toLowerCase() == argname.toLowerCase())
		{
			return unescape(value);
		}
	}
	return "";
}