Making A Simple Will Anyone Know How I Make Browser Check Errors Good Again When Making Simple Html Websites In Dreamweaver?

Anyone know how I make browser check errors good again when making simple html websites in dreamweaver? - making a simple will

major problems on safari, where I get a white border around all my pictures and Firefox, they seem to break the text, it is Times New Roman, then a space between the pictures that I rollover into a table. ..

Sites are very similar, ie it is assumed - Firefox is the main problem .. Im not a massive technology of the mind, a simple the best ... thank you x