I use Firebug for debugging JS and HTML in Mozilla a LOT but every now and then I run into an IE-only JavaScript bug, which are really hard to locate (ex: error on line 802 Char 1, when the source HTML only has 300 lines).
I badly need to have a lightweight JS tool (like firebug) for IE, something I can install in seconds on a client's PC if I run into an error and then uninstall. Some Microsoft tools take some serious download and configuration time.
Any suggestions please? I am using IE-7