I am trying to use dhtmlxtabbar in my application,


I am trying to use dhtmlxtabbar in my application, but I have a problem that it does not work if the browser is in standards mode. i.e. if I start an HTML page with a doctype like:

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "w3.org/TR/html4/DTD/strict.dtd">



 which switches the browser to standard mode, then the tabs do not display. If however I use a doctype that puts the browser in quirks mode (like the examples on your website) then it works.

Do you have any idea how to fix this? I need to work in standards mode to support other CSS on the page.


The tabbar can work with strict html and xhml 
doctypes. The problem can be caused by samples, most of them has next
definition


           

where "px" postfix missed, correct one is


           

please check that in your case postfix "px" present for container width and height.