var tei_isIE  = (navigator.appVersion.indexOf("MSIE") != -1) ? true : false;
var tei_isFx = false;
var tei_FxMV = 0;
var tmp_num = navigator.userAgent.match(new RegExp("Firefox/[0-9]{1,2}\.[0-9]{1,2}"));
if( tmp_num != null )
{
    tei_isFx = true;
    tei_FxMV = Math.floor(parseFloat(String(tmp_num).replace("Firefox/","")));
}
//var tei_isOpera = (navigator.userAgent.indexOf("Opera") != -1) ? true : false;
var tei_isIEFx = tei_isIE || tei_isFx ? true : false;