Friend to do web development are clear, js Debugging is quite depressing, because first of all, more flexible language grammar, it is a weak type of scripting language, a lot of errors are beyond the control of these aside, the most painful Nothing is good debugging tool, the current situation better than before, at the next Firefox have firebug, it is indeed a good js debugger tool, but it is troublesome to use IE, but the effect is very bad, I have been suffer from looking for a good js debugger under IE tools, be able to automatically capture the errors, and positioning the location and reason, even today, did not expect to find at unintentionally so good instrument, they dare not possession, sharing out the hope for Members bring convenience to web developers

This tool is named Companion.JS Please note that this is not a js file, but a name, as it is ie the use of plug-ins to install, and require a combination of Microsoft Script Debugger to use, through the installation of this tool, but an error page will be at the top left corner a small pop-up error message, click the following in IE shows an error console, such as FF on the Firebug console like. Very detailed error message.

Officers are as follows Nets a sample error map:
Companion.JS IE javascript debugging tool