urgent! Asking for tab code_html/css_WEB-ITnose

I want to add a tab to the left side of the web page. When the web page is scrolled, the tab position does not change. How to write the code?

Reply to the discussion (solution)

The text on the TAB should be arranged vertically with the text direction to the left. How to achieve this?

positio: fixed;

-webkit-transform: rotate(-90deg);
-moz-transform: rotate(-90deg);
filter: progid :DXImageTransform.Microsoft.BasicImage(rotation=3);
display:block;