function ConstructURL(url,removeterms,addterms) {

	var params = BuildURLArray(url);

	var newurl = "";
	
	var eneroot = 0;

	for (var i=0; i<params.length; i++) {

		val = CheckArray(removeterms,params[i][0]);

		if (val == -1)

			newurl = newurl + "&" + params[i][0] + "=" + params[i][1];

	}

	for (var i=0; i<addterms.length; i++) {

		newurl = newurl + "&" + addterms[i];

	}

	if (newurl.length > 0) {

		newurl = newurl.substr(1);

		newurl = "?"+newurl;

	}

	else {

		newurl = "?N="+eneroot;

	}

	return newurl;

}

function BuildURLArray(oldurl) {

	var returnArray = new Array();

	var url;

	if (oldurl == "CURRENTURL")

		url = location.search;

	else if (oldurl == "BLANKURL") {



	}

	else {

		var tokens = oldurl.split("?");

		url = "?"+tokens[1];

	}		

	if (url) {

		url = url.substr(1);

		var params = url.split("&");

		for (var i=0; i<params.length; i++) {

			var param = params[i].split("=");

			returnArray[i] = param;

		}

	}

	return returnArray;

}

function CheckArray(removeterms,checkterm) {

	for (var i=0; i<removeterms.length; i++) {

		if (removeterms[i] == checkterm)

			return 1;

	}

	return -1;

}