1 function client(o){
2 var b = navigator.userAgent.toLowerCase();
3 var t = false;
4 if (o == 'isOP'){
5 t = b.indexOf('opera') > -1;
6 }
7 if (o == 'isIE'){
8 t = b.indexOf('msie') > -1;
9 }
10 if (o == 'isFF'){
11 t = b.indexOf('firefox') > -1;
12 }
13 return t;
14 }