51help TIY
码：
<html> <head> <script type="text/javascript" src="../jquery/jquery.js" tppabs="http://www.51help.tk/jquery/jquery.js"></script> <script type="text/javascript"> $(document).ready(function(){ $(".btn1").click(function(){ $("#span1").text($(window).height()); $("#span2").text($(document).height()); }); }); </script> </head> <body> <p>是 <span id="span1">unknown</span> px。</p> <p>是 <span id="span2">unknown</span> px。</p> <button class="btn1">获得高度</button> <p>它们在 iframe 中显示。</p> </body> </html>
查看结果: