Hay.... you can try this one
function PhoneValidations(event) {
var val;
if (navigator.appName == "Microsoft Internet Explorer")
val = window.event.keyCode;
else
val = event.which;
if (val == 0)
val = event.keyCode;
if ((val >= 48 && val <= 57) || val == 45 || val == 37 || val == 39 || val == 9 || val == 40 || val == 41 || val == 32) {
return true;
}
else if (val == 8)
return true;
else
return false;
}
In Args you need to pass the e. (i.e. the event of page)
Umesh Pansara