can anyone tell methods of form validation other than regex in javascript also can anyone suggest any alternate methods without Regex for this following code?
function AllowAlphabet(){
if (!frm.alphabet.value.match(/^[a-zA-Z]+$/) && frm.alphabet.value !="")
{
frm.alphabet.value="";
alert("Please Enter only alphabets");
}
if(frm.alphabet.value.length > 5)
alert("max length exceeded");
you could do:
var keyCode = window.event.keyCode || event.which;
if ((keyCode < 65 || keyCode > 90) && (keyCode < 97 || keyCode > 123) ) {
alert("only letters allowed");
}
I'd do it with RegEx if I'm honest, however since you're asking, maybe you can do something like this:
var isValid = function (input) {
for (var i = 0; i < input.length; i++) {
var c = input.charAt(i);
if (!isNaN(parseInt(c))) {
return false;
}
}
return true;
};
Here is a fiddle to demonstrate: http://jsfiddle.net/SVy3R/1/
I'd like to note that I'm not sure what the performance here is, also I haven't tested it for various corner cases, but it should do the trick.
//this function allow only alphabets in textbox
<script language="Javascript" type="text/javascript">
function onlyAlphabets(e, t) {
try {
if (window.event){
var charCode = window.event.keyCode;
}
else if (e) {
var charCode = e.which;
}
else { return true; }
if ((charCode > 64 && charCode < 91) || (charCode > 96 && charCode < 123))
return true;
else
return false;
}
catch (err) {
alert(err.Description);
}
}
</script>
<input type="text" onkeypress="return onlyAlphabets(event,this);" />
