请问这行代码错在哪里？（回答最全者得35分）

Question

<a href="javascript:window.open('index.htm','DisplayWindow')">文字</a>

Answer 1

<a href='javascript:window.open("index.htm","DisplayWindow")'>文字</a>

Answer 2

可改为：<a href="javascript://" onClick='window.open("index.htm","DisplayWindow")'>文字</a>

Answer 3

1,<a href="javascript:void(window.open('index.htm','DisplayWindow'))">文字</a>2,<a href="javascript:void(null)" onclick="window.open('index.htm','DisplayWindow')">文字</a>3,<span onclick="window.open('index.htm','DisplayWindow')">文字</span>4,<a href=# onclick="window.open('index.htm','DisplayWindow')">文字</a>5,<span style="cursor:hand"  onclick="window.open('index.htm','DisplayWindow')">文字</span>6,<p style="cursor:hand"  onclick="window.open('index.htm','DisplayWindow')">文字</p>7,<div style="cursor:hand"  onclick="window.open('index.htm','DisplayWindow')">文字</div>8,<font style="cursor:hand"  onclick="window.open('index.htm','DisplayWindow')">文字</font>9,<input type=button onclick="window.open('index.htm','DisplayWindow')" style="border:0;background-color:#ffffff" value=文字>10,<input type=text onclick="window.open('index.htm','DisplayWindow')" style="border:0;background-color:#ffffff" value=文字> 11,<a href="index.htm" target="DisplayWindow">文字</a>