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<%
a="ggg125@#$"
dim a,i
'a=renquest.from("字段")'传来注册的值
if instr("abcdefghijklmnopqrstuvwxyz",left(a,1))>0 then
for i=1 to len(a)
if instr("abcdefghijklmnopqrstuvwxyz0123456789_",mid(a,i,1))=0 then
response.write"非法字符"
response.end
end if
next
else
response.write"请已英文开头"
response.end
end if
%>
var reg=/^(?!_|\d.*$)\w+$/i;
alert(reg.test("_skjdfkj"));//false
alert(reg.test("88skjd87fkj"));//false
alert(reg.test("skjdfkj"));//true
alert(reg.test("87876786"));//false
alert(reg.test("skj989dfkj"));//true
/^(?!_|\d.*$)\w+$/i;
//试试这个正则
Set reg = New RegExp
reg.Pattern ="^[A-Za-z0-9_]+$"
reg.Global = True
reg.IgnoreCase = True
Set reg = New RegExp
reg.Pattern ="^[A-Za-z0-9-]+$"
reg.Global = True
reg.IgnoreCase = True