actually I already gave up this idea, but I am sure it could be interessting for others. I know, that for IE5 and higher you can make special coloured scroll bars. Here is a website, where you can generate the code:
I generated the code and pasted it into a text file. Then named this file scroll.css and dropped it on my server in the main directory. Also later into the main of the theme ... and furter places.
Then I went to the theme options and placed this link into HTML/CSS inserts. Placed it into HTML Header inserts: <link rel="stylesheet" type="text/css" href="scroll.css">
It did not work out. Then I dumped the css directly into CSS inserts ... did not work either. Then I placed it into different locations all over some scripts. The only result was, that the scroll bars in my contact forms (text form) exactly matched the scroll bar colours I wanted. But I could not apply it to the right side scroll bar of the browser. Where do I have to place the css ? Or where do I have to place the css file and place the link to get it running ?