Question

I am having a weird issue in IE.

I have

The tool variable can be empty and it seems like that I need to have
tool=='' to make IE happy.

//work in IE and other browsers..
  if(tool==null || tool==''){Alert('bang!!!');}

//doesn't work in IE but not other browsers.
  if(tool==null){Alert('bang!!!');}

What’s going on here?

Answer 1

Try this:

if( !tool ){
  Alert('bang!!!');
}

Here, !tool will return true if tool = null or tool = ''.