Input parameter check function ??

[Bikash Paul]

Hi,
I want to check input parameter of serach text box which is supplied by user.User have to give input parameter for serach like this(a%,b%,c% etc.)if they give any input parameter other than this then i want to give alert message to user.Can any one please guide me how i can write this function.
Thanks & Regards
Bikash

[qu shihong]

you should learn regular expression.

[Eric Pascarello]

Here is the basic idea....

<script>
function AllowOnly(StrT){
  var StrRE = /^\D{1}%{1}$/;
  if(StrT.match(StrRE)){
    return true;
  }
  else if(StrT.length == 0){
    alert('This field is required.');
return false;
}
  else{
    //alert('Invaild characters entered!');
    return false;
  }
}
alert(AllowOnly('A%'));
alert(AllowOnly('A%A'));
alert(AllowOnly('AA'));
alert(AllowOnly('%A'));
alert(AllowOnly(''));
</script>

Eric

[Yuriy Fuksenko]

Usually I do such thing server side.
I mean, it is easy to bypass JS validation and send anything to your server.
That includes quotes, semicolons and SQL commands

[Bikash Paul]

Hi Eric,
Thanks for ur basic idea.
Thanks & Regards
Bikash