This exercise demands that we locate information about the CSS2 guidelines established by the W3C Consortium, and check to see if they are implemented in the Fifth Generation of the two major browsers. Of course, information is out there about the sixth or latest generation of browsers, but I will stick to the literal requirements of this exercise just to see what I come up with!
First of all, you can find the CSS2 definitions at the W3C site dealing with this agreement.
This new CSS coding works in IE5, but information about whether it works in Netscape 5 was contradictory and sparse. One reason for this is, I think, that Netscape have turned their main page into a vendor for light-weight news as opposed to focusing upon Netscape information or product support (as at Microsoft's main page). Thus I can find the latest babbliings from inept politicians but I can not find much information about Netscape 5. Netscape 6 is well-hyped, however, although even there information about CSS compatibility is limited.
Here is how behavior would be defined for a simple form function:
<html>
<head>
<style>
.mask {behavior: url(mask.sct);}
</style>
</head>
<body style="font-family: verdana">
<h2>Mask Input Fields</h2>
date
<input type=text class=mask maskType=date><br>
money
<input type=text class=mask maskType=money><br>
time
<input type=text class=mask maskType=time><br>
</body>
</html>
Again, this new CSS2 guideline is fully applied to IE5 but information about its applicability to Netscape is scanty. The boast about Netscape 6 make it clear that most of the CSS2 guidelines apply to that generation of browsers, but not whether they applied to earlier generations. If you were to look at the history of the competition between these two browsers you could argue that it was Netscape's failure to come up with useful development in DHTML coding and W3C compatibility in its Fifth Generation browser which sealed its fate in the browser market. Netscape 6 has no market demand to support it and Microsoft, with all their monopolisitic activities, has won the browser wars!