function GetParamUrl( strNameParam )
{
	// get the current URL
	var url = window.location.toString();

	//get the parameters
	url.match(/\?(.+)$/);

	var params = RegExp.$1;
	// split up the query string and store in an
	// associative array
	var params = params.split("&");
	var queryStringList = {};

	for(var i=0;i<params.length;i++)
	{
		var tmp = params[i].split("=");
		queryStringList[tmp[0]] = unescape(tmp[1]);
	}

	return queryStringList[strNameParam];
}	

function ChangeLink(strIdLink, strAddLink)
{
	var objLink = document.getElementById(strIdLink);
	if (objLink)
		objLink.href = objLink.href + '?' + strAddLink;
}