第一次看到无缺提问
overflow支持以下标记：
A, ACRONYM, ADDRESS, APPLET, B, BDO, BIG, BLOCKQUOTE, body, CENTER, CITE, CODE, currentStyle, custom, DD, defaults, DEL, DFN, DIR, DIV, DL, DT, EM, EMBED, FIELDSET, FONT, FORM, Hn, I, INS, KBD, LABEL, LEGEND, LI, LISTING, MENU, OL, P, PLAINTEXT, PRE, Q, RT, RUBY, runtimeStyle, S, SAMP, SELECT, SMALL, SPAN, STRIKE, STRONG, style, SUB, SUP, TABLE, TD, TEXTAREA, TT, U, UL, VAR, XMP
