Using dhtml

Hi,

All

( Problems with coding DHTML technologies WILL occur as long as each browser creates its own proprietary features and technology that is not supported by other browsers. A Web page may look great in one browser and horrible in another.)

This is of the paragraph i was just seeing on w3schools on dhtml .

I just wanna know how much does it effect if using dhtml technologies as written in paragraph . like ie, fire fox or what ever browser some one is using , how much effect does it create on diff browsers like in layour or script or whtever

I just wana say i dont have much exp in web designing i have started exploring the things , i hope u all guys dont think that is a weird question…

Thanks a lot

Rohit