document.write<!DOCTYPE html><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>Math </title><script type="text/javascript">document.write(Math.floor(3.3)+ "<br>"+"無法顯示");document.write(Math.floor(-0.1)+ "<br>");document.write(Math.floor(-9.9)+ "<br>");document.write(Math.floor(8.9));</script></head><body></body></html>發(fā)現頁面不會出現結果,求大神指點哪里錯誤
document.write輸出?
黃森h(huán)uang
2016-10-28 09:05:54