JavaScript Funtion

<%@ Language=VBScript %>
<%
Response.Write "<INPUT type=""button"" value=""Button"" id=button1
name=button1"">"
Response.Write "<INPUT type=""button"" value=""Button"" id=button2
name=button2"">"
%>
<Script language="VBScript">
function button1_onclick()
document.Write "ab"
end function
</script>
<Script language=JavaScript>
function button2_onclick()
{
document.write("ac");
}
</script>
When clicks button1,shows "ab".But clicks button2 cannot show "ac".How can
run function button2_onclick()?