Quasi and Cush, thanks for the replies. I am using Windows 7 Home Premium and Firefox 11.0. The problem started about a week ago. Let me try to describe it a little differently.
If the symbol is already highlighted, I can type in a new one without any problem. However, if the symbol is not highlighted (because I clicked on a different window, etc., then came back to the Stockcharts window), and I run the cursor over the symbol to "re-highlight" it, as soon as I take my finger off the mouse, the highlighting disappears. Then I have to re-highlight it again, and the second time it usually takes.
However, if I'm not paying attention and type in a new symbol without highlighting the box a second time, the new symbol appears in front of the old symbol (e.g., "AAPLMSFT"), and then I get no chart when I click to bring up the new chart.
Put another way, until about a week ago, if the symbol was not highlighted, I simply had to run the cursor over the box once to be able to enter a new symbol, and now I have to do it twice. Perhaps it coincided with a FF update about a week ago?
This should be my biggest problem in life, lol, but it is a nuisance when I'm trying to run through charts rapidly. Any thoughts? Thanks!