//IE6的userAgent:Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)
//Firefox的userAgent\:Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.8.1.6) Gecko/20070725 Firefox/2.0.0.6
function getType(){
if(navigator.userAgent.indexOf("MSIE")>0)
return 1;
else if(navigator.userAgent.indexOf("Firefox")>0)
return 2;
}