正则表达式的问题

[yaobx1983]

字符串head,bottom
如何匹配head作为开头,bottom作为结尾的字符串?
head************bottom,正则表达式怎样写?

[sd5816690]

^head.*?bottom$

[sd5816690]

^head.*?bottom$

[sd5816690]

^head.*?bottom$

[一把编程的菜刀]

^head[\s\S]*bottom$

[竹贤侄]

<%
function findhb(str)
set re=new Regexp
re.Global   =   True   
  re.IgnoreCase   =   True
re.pattern="^head[\s\S]*bottom$"
Set Matches = re.Execute(str)
For Each Match in Matches
RetStr = RetStr & "找到第 " 
RetStr = RetStr & Match.FirstIndex+1 & "个匹配项的值是：'" 
RetStr = RetStr & Match.Value & "'." & vbCRLF &"<br>"
Next 
findhb=RetStr
end function

str="headasdfsdfsafasf asdfasdfbottom"

response.Write(findhb(str))


%>