急求一个正则表达式~如何过滤下划线和包括下划线后面的内容

正则表达式 [^_]*

ASP 例子

<%

Dim reg,str

str = "asd你好asd你好_fdsfdsfds"

Set reg = New RegExp

reg.Pattern = "[^_]*"

reg.IgnoreCase = true

reg.Global = False

Set Matches = reg.Execute(str)

Response.Write(Matches(0))

%>

Javascript 例子

<script type="text/javascript">

var reg = /[^_]*/

var str = "asd你好asd你好_fdsfdsfds";

alert(reg.exec(str));

</script>