Keystroke detector : Key Event : Event JAVASCRIPT TUTORIALS


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Keystroke detector

















<HTML>
<HEAD>
<TITLE>Keystroke detector</TITLE>
</HEAD>
<BODY>
<SCRIPT>  
   
function checkKey(e){
   if (e.keyCode == 84){
      if (navigator.appName == "Microsoft Internet Explorer")
         e.returnValue = false//works with Explorer
      else {
         //deal with Navigator or Mozilla
         str = document.theForm.theText.value;
         if (str.length == 1
            newstr=" ";
         else {
            newstr = str.substring(0, str.length -1);
         }
         document.theForm.theText.value = newstr;          
      }
   }
   else {     
      alert ("You entered the character " + String.fromCharCode(e.keyCode".");
   }
}
</SCRIPT>

<FORM name="theForm">
<INPUT type=text name="theText" onKeyDown="checkKey(event);">

</FORM>

</BODY>
</HTML>







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