If your webpage involves java scrips, sometimes page may complain about the errors may work correctly, but the browser may not let you see where the errors are. If you want to see what the error is, you have to enable the option “Display a notification about every script error” in your Internet Explorer browser.
1. Open Internet Explorer
2. On the menu bar click Tools and select the menu Internet Options.
3. Select the Advanced tab
4. Check the box “Display a notification about every script error” in the Browsing section.
5. Press “OK”
Make sure to To turn off the scripting debugger to resume the normal browsing.