DHTML and Different Browsers?

[said_fox]

do each web browser has its own DHTML rules?!
Why what's work on MS IE may be does not work on NetScape or Opera.
do each company or Browser has its own Rules?
How can I ensure that my DHTML Scripts will be Browser indebendent?
I'm also noting that the rules for IE make the programmer to have more abilities to do best interfaces using DHTML. Do this true?

[pyro]

The main reason is IE's proprietary code. NN/Mozilla tend to follow the W3C's recommendations, including the DOM (http://www.w3.org/DOM/) IE, on the other hand, has it's own DOM, and many proprietary javascript commands thus requiring web developers to create workarounds in order for their scripts to work in both IE and Gecko based browsers. The reason the you are able to find more interfaces for IE, is probably due to the fact that around 90% of web users use it, and thus there are many programmers who program for it