Accept only number in a text box in JavaScript
similar:
1) Allowing only certain character in a text box.
2) Validation in TextBox which accepts only numbers value.
3) Allow only numbers / digits in TextBox.
Here is the code bellow
for the text box where digits are allowed and alphabetic characters are not allowed.
Observe, too, that arrow keys and backspace _are_ allowed so that you
can still edit what you type.
Copy and paste java script code inside <head> tag and call the java script function on text box onkeypress event as given bellow.
Here is the two example you can try any of them all are working fine in all browsers IE,Netscape/Mozilla.
<script type="text/javascript">
function
fnAllowNumeric() {
if
((event.keyCode < 48 || event.keyCode > 57) && event.keyCode !=
8) {
event.keyCode = 0;
alert("Accept
only Integer..!");
return
false;
}
}
</script>
<body>
<input id="txtChar" onkeypress="return fnAllowNumeric()" type="text" />
</body>
<script type="text/javascript">
function
CheckNumericValue(e) {
var key
= e.which ? e.which : e.keyCode;
//enter
key //backspace //tabkey //escape key
if ((key
>= 48 && key <= 57) || key == 13 || key == 8 || key == 9 || key
== 27) {
return
true;
}
else {
alert("Please
Enter Number Only");
return
false;
}
}
</script>
<body>
<input id="txtChar" onkeypress="return CheckNumericValue(event)" type="text" />
</body>
