java script validation

Hi Vibhakar,

Use regex to allow/restrict keyboard input here is an example from qodo.co.uk:
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/* code from qodo.co.uk */
// create as many regular expressions here as you need:
var digitsOnly = /[1234567890]/g;
var floatOnly = /[0-9\.]/g;
var alphaOnly = /[A-Za-z]/g;

function restrictCharacters(myfield, e, restrictionType) {
if (!e) var e = window.event
if (e.keyCode) code = e.keyCode;
else if (e.which) code = e.which;
var character = String.fromCharCode(code);
// if they pressed esc... remove focus from field...
if (code==27) { this.blur(); return false; }
// ignore if they are press other keys
// strange because code: 39 is the down key AND ' key...
// and DEL also equals .
if (!e.ctrlKey && code!=9 && code!=8 && code!=36 && code!=37 && code!=38 && (code!=39 || (code==39 && character=="'")) && code!=40) {
if (character.match(restrictionType)) {
return true;
} else {
return false;
}
}
}
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You can check the example here:
http://www.qodo.co.uk/blog/javascript-restrict-keyboard-character-input/

and check the demo here:
http://www.qodo.co.uk/assets/files/uploads/javascript-restrict-keyboard-character-input.html


HTH :)