JS Filter Special character code

Here to provide two Web page special effects filter Code Oh, so you can filter some illegal data, database tutorial security played a certain role oh.
ASP Tutorials: TextBox id= "Txtfoldernameeng" CSS Tutorial class= "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 var txt = new RegExp ("[*,&,\,/,?, |,:,<,>,"] ");

<script>
Function textvalidate () {
var code;
Var character; The
var err_msg = folder name can 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>
See one more instance

Function checkalltextvalid (form)    
{   
   // Record number of text boxes without quotes    
 var resulttag = 0;   
   //record number of all text boxes    
    var flag = 0;   
 for (var i = 0; i < Form.elements.length; i + +)    
 {   
  if (form.elements[i].type== "text")     
  {   
            flag = Flag + 1;   
  //Here fill in the special symbols to be filtered    
  //Note: Change the character at #, Other parts are not allowed to modify .   
  //if (/^[^#]*$/.test (form.elements[i].value))      
  
   if (/^[^| "' <>]*$/.test (form.elements[i].value))   
                 Resulttag = resulttag+1;  
   else  
    form.elements[i]. Select ();  
 }  
 }  
 
   /**   
     * If a text box with quotes is equal to the value of all text boxes, the checksum passes   
     */   
 if (Resulttag = = flag)   
  return true;  
 else  
 {  
  Alert (text box cannot contain nn 1 single quotes: ' N 2 double quotes: "N 3 Vertical    | N 4 Sharp Corner number: < > NN please check the input! ");   
  return false;   
 }   
}