Letter only, yes no only textfield : TextField « Form Control « JavaScript DHTML






  1. JavaScript DHTML
  2. Form Control
  3. TextField

Letter only, yes no only textfield 

  
<HTML>
<HEAD>
<TITLE>Letter only, yes no only textfield </TITLE>
<SCRIPT> 
function lettersOnly(evt) {
    evt = (evt) ? evt : event;
    var charCode = (evt.charCode) ? evt.charCode : ((evt.keyCode) ? evt.keyCode : 
        ((evt.which) ? evt.which : 0));
    if (charCode > 31 && (charCode < 65 || charCode > 90) && 
        (charCode < 97 || charCode > 122)) {
        alert("Enter letters only.");
        return false;
    }
    return true;
}

function ynOnly(evt) {
    evt = (evt) ? evt : event;
    var charCode = (evt.charCode) ? evt.charCode : ((evt.keyCode) ? evt.keyCode : 
        ((evt.which) ? evt.which : 0));
    if (charCode > 31 && charCode != 78 && charCode != 89 && 
        charCode != 110 && charCode != 121) {
        alert("Enter \"Y\" or \"N\" only.");
        return false;
    }
    return true;
}

</script>
</head>
<body>
<form>
Signature Present: <input type="text" name="signature" size="2" maxlength="1" 
onkeypress="return ynOnly(event)" /> (Y/N)
</form>
</body>
</html>








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