Lose your place in the unread threads list?

[eJM]

There are times when I click into a forum and the list of unread threads is daunting. As the administrator, I try to, or want my staff to look over each thread. Occasionally the thread has a number of posts I read and by the time I click back to the thread list, I've lost my place. The down arrows are still there and I can't remember the thread title to remember where I am in the list.

I would like to add an additional image, another down arrow, to the mix, that will have the appearance of changing colors when it has been clicked on - like what the multi-quote button does in the message display. I've never designed or developed a hack/plug-in, so I was hoping one of the coders could come up with something. I thought it could be done with a little CSS magic, or maybe it should be JavaScript, but ajax would be my choice, just like the multi-quote routine.

These are the 2 images that will be linked to the first new message in a thread:

Here is the current CSS and code (from SHOWTHREAD template), which uses only the first image:

You must first be a registered member to view any code.

You must first be a registered member to view any code.

I am not concerned about whether the image changes when hovered, only when clicked. Can you help me with the CSS and other code (hopefully ajax)?

Thank you,

Jim
PS: the code I supplied above is not from the default code for vBulletin - I use a custom style. But it's similar.