var STR_PAD_LEFT = 1;
var STR_PAD_RIGHT = 2;
var STR_PAD_BOTH = 3;

function strpad(str, len, pad, dir) {

	if (typeof(len) == "undefined") { var len = 0; }
	if (typeof(pad) == "undefined") { var pad = ' '; }
	if (typeof(dir) == "undefined") { var dir = STR_PAD_RIGHT; }

	if (len + 1 >= str.length) {

		switch (dir){

			case STR_PAD_LEFT:
				str = Array(len + 1 - str.length).join(pad) + str;
			break;

			case STR_PAD_BOTH:
				var right = Math.ceil((padlen = len - str.length) / 2);
				var left = padlen - right;
				str = Array(left+1).join(pad) + str + Array(right+1).join(pad);
			break;

			default:
				str = str + Array(len + 1 - str.length).join(pad);
			break;

		} // switch

	}

	return str;

}


function getxmlhttp() {
    var xmlhttp = false;

    try {
        xmlhttp = new ActiveXObjet("Msxml2.XMLHTTP");
        //alert("You are using MS-IE.");
    } catch (e) {
        try {
            xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
            //alert("You are using MS-IE");
        } catch (E) {
            xmlhttp = false;
        }
    }

    if (!xmlhttp && typeof XMLHttpRequest != 'undefined') {
        xmlhttp = new XMLHttpRequest();
        //alert("You are not using MS-IE");
    }

    return xmlhttp;
}



function tfg_categories(serverPage, objID, catID) {
	xmlhttp = getxmlhttp();

	var sCat = document.getElementById(catID).value;
	var obj = document.getElementById(objID);
	var srvPage = serverPage + "?c=" + sCat;
	
	xmlhttp.open("GET", srvPage);
	xmlhttp.onreadystatechange = function() {
		if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
			obj.innerHTML = xmlhttp.responseText;
		}
	}
	xmlhttp.send(null);
}


f