获取网页变量问题
var
IE: Olevariant;
begin
IE := webbroser1.OleObject.document.all.item('username',0);

//如何判断IE对象是否存在


[解决办法]
http://blog.csdn.net/zhongguoren666/article/details/6904515

http://blog.csdn.net/zhongguoren666/article/details/6904528
[解决办法]

Delphi(Pascal) code

if VarIsClear(IE) thenbegin//IE对象为空时候处理end;