JS code _javascript techniques for special character input

Copy Code code as follows:

<script>
function Textvalidate () {
var code;
var character;
var err_msg = "folder name cannot contain one of the following characters: \ n \/: *? \ "< > | &, ";
if (document.all)
{
Code = Window.event.keyCode;
}
else {
Code = Arguments.callee.caller.arguments[0].which;
}
var character = String.fromCharCode (code);
var txt = new RegExp ("[\\*,\\&,\\\\,\\/,\\?,\\|,\\:,\\<,\\>,\"]);
if (txt.test (character)) {
alert (err_msg);
if (document.all) {
Window.event.returnValue = false;
}
else {
Arguments.callee.caller.arguments[0].preventdefault ();
}
}
}
</script>

Asp:textbox id= "Txtfoldernameeng" cssclass= "Frmtxt" runat= "Server" maxlength= "onkeypress=" "Textvalidate" () >

Use the above method in the onkeypress event of the TextBox.

You can restrict the input *,&,\,/,?, |,<,> If you need to restrict more special symbols, just click on the var txt = new RegExp ("[\\*,\\&,\\\\,\\/,\\?,\\|,\\:,\\<,\\ >,\ "]");
can be added in.