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html是否對(duì)話框(html對(duì)話框彈出效果)
lthtml lthead lttitleHTML網(wǎng)頁(yè)打開(kāi)后跳出來(lái)一個(gè)對(duì)話框，需要點(diǎn)確定lttitle lthead ltbody onload=quotjavascriptwindowalert#39確定嗎#39quot ltbody lthtml 如果要把提示分為兩行居中顯示代碼如下lthead...