问一个简单正则的含义，up有分

(<body\s*|\w*>)(.*?)(<\/body>)

解决方案 »

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试试
<body\s*|\w*>)(\s|\S)*(<\/body>
(<body\s*\w*>)(.*?)(<\/body>)
str.match(/<body[^>]*>(.+?)<\/body>/gim);
^(<body\s*|\w*>)(.*?)(<\/body>)$ 注意大小写....
<html>

<script language="javascript">
function fly(){
      strBody=document.body.outerHTML
        alert(strBody.match(/<body>(.|\n)*<\/body>/ig))
}
</script>
   <body>
<input type=button value="飞天给你正解" onclick=fly() >
<table width="87%" border="1" cellspacing="0" cellpadding="0" align="" style="margin-left:10" ID="Table1">
<thead>
<tr class=row1tr>
  <td>Select</td>
  <td>Coverage Period</td>
  <td>From Date<br>(DD/MM/YYYY)</td>
  <td>To Date<br>(DD/MM/YYYY)</td>
</tr>
</thead>
<tbody id="DataTable">
<tr ack="update" old_period="1" cannotDel=""  firstPRrow="false"  lastPRrow="false">
<td align=center><input type="radio" name="select" ID="Radio1" VALUE="Radio1"></td>
<td align=center>1</td>
<td align=center nowrap><input type=text value="1" size=2  style='text-align:right;background-color:menu' readonly maxlength=2 ID="Text1" NAME="Text1">/<input type=text value="1" size=2 style='text-align:right;background-color:menu' readonly maxlength=2 ID="Text2" NAME="Text2">/<input type=text value="2004" size=4 style='text-align:right;background-color:menu' readonly maxlength=4 ID="Text3" NAME="Text3"></td>
<td align=center nowrap><input type=text onchange="changeDate(this)" value="31" size=2 style='text-align:right'   maxlength=2 ID="Text4" NAME="Text4">/<input type=text onchange="changeDate(this)" value="3" size=2 style='text-align:right' maxlength=2 ID="Text5" NAME="Text5">/<input type=text onchange="changeDate(this)" value="2004" size=4 style='text-align:right'  maxlength=4 ID="Text6" NAME="Text6"></td>
</tr>
<tr ack="update" old_period="2" cannotDel=""  firstPRrow="false"  lastPRrow="false">
<td align=center><input type="radio" name="select" ID="Radio2" VALUE="Radio2"></td>
<td align=center>2</td>
<td align=center nowrap><input type=text value="1" size=2  style='text-align:right;background-color:menu' readonly maxlength=2 ID="Text7" NAME="Text7">/<input type=text value="4" size=2 style='text-align:right;background-color:menu' readonly maxlength=2 ID="Text8" NAME="Text8">/<input type=text value="2004" size=4 style='text-align:right;background-color:menu' readonly maxlength=4 ID="Text9" NAME="Text9"></td>
<td align=center nowrap><input type=text onchange="changeDate(this)" value="30" size=2 style='text-align:right'   maxlength=2 ID="Text10" NAME="Text10">/<input type=text onchange="changeDate(this)" value="6" size=2 style='text-align:right' maxlength=2 ID="Text11" NAME="Text11">/<input type=text onchange="changeDate(this)" value="2004" size=4 style='text-align:right'  maxlength=4 ID="Text12" NAME="Text12"></td>
</tr>
</tbody>
</table>
</body>
</html>
/<body>(.|\n)*<\/body>/ig
如果body有属性就：
/<body.*>(.|\n)*<\/body>/ig