IE Error with JavaScript: Web page is not being displayed

I often visit a secured website but I never had a problem on opening and closing it. Or I never encountered any problem with downloading or uploading my files. But lately, I keep getting an error with JavaScript which causes my Internet Explorer to stop functioning correctly. I posted a screenshot of the error below.
I understand that this is a common problem which I thought can be easily resolve by just re-starting my browser, but when I restarted it, after few minutes or few hours, it will randomly stops and give me this error. How can I correct this? Help me Experts! Thanks.

Internet Explorer
Problems with this Web page might prevent it from being displayed properly or functioning properly. In the future, you can display this message by double-clicking the warning icon displayed in the status bar.
Line:71
Char:1
Error: Object expected
Code:0
