回复：html网站问题请教

beforef insert the following

if the image need repeat, you can set repeat-x,repeat-y,
http://www.w3schools.com/css/tryit.asp?filename=trycss_background-image
just google it,
you can also check
http://css.maxdesign.com.au/selectutorial/selectors_id.htm, you can know different css selectors, f.ex css id selector