Question

dreamweaver文本域怎么限制指定输入的位数

怎么限制文本域输入必须是16位，如果少输入一位或者多输入一位都会提示输入错误？？？
q=replace(trim(request.form("q")),"<","")
w=replace(trim(request.form("w")),"<","")
e=replace(trim(request.form("e")),"<","")
r=replace(trim(request.form("r")),"<","")
t=replace(trim(request.form("t")),"<","")
y=replace(trim(request.form("y")),"<","")
i=replace(trim(request.form("i")),"<","")
o=replace(trim(request.form("o")),"<","")
u3=request.ServerVariables("REMOTE_ADDR")
if q=""then
response.Write"<script>window.alert('请您输入正确卡号！');history.go(-1);</script>"
response.End()
怎么限制输入6位数 多输入或者少输入都提示输入正确卡号

Answer 1

可以在input增加一个事件，进行检查，如：

<input onchange="if (this.value.length != 16) { alert('请输入正确卡号'); }">