how to use javascript to valida a text field value is a text

xiaodao

01-02-2007, 06:34 PM

hi

i have a textfield i want the input be words instead of numbers and symbols

how to do it?

please help

Mr J

01-02-2007, 06:56 PM

Try this snippet

<script type="text/javascript">

</script>

<input type="text" value="" onkeyup="chkChar(this)">

Philip M

01-02-2007, 07:02 PM

<HEAD>
<SCRIPT type="text/JavaScript">
function validate(f) {
if (/[^A-z\s]/gi.test(f.value)) {
alert("Only alpha characters and spaces are allowed!");
f.value = f.value.replace(/[^A-z\s]/g,"");
}
}
</SCRIPT>
</HEAD>
<BODY>
<input type="text" onkeyup="validate(this)">
</BODY>

There is a typo in Mr J's version:-

function chkChar(obj){
obj.value = obj.value.replace(/[^a-z\s]/gi,'')
}

Mr J

01-02-2007, 07:21 PM

I think it was because I used the php tags it lost the backslash

There should be a backslash between here \ and here

See its gone and lost it again :D

So I put my previous post in code tags

xiaodao

01-02-2007, 11:33 PM

if i also disallow space how

Philip M

01-03-2007, 07:46 AM

remove \s in both versions:-

<HEAD>
<SCRIPT type="text/JavaScript">
function validate(f) {
if (/[^A-z]/gi.test(f.value)) {
alert("Only alpha characters are allowed!");
f.value = f.value.replace(/[^A-z]/g,"");
}
}
</SCRIPT>
</HEAD>
<BODY>
<input type="text" onkeyup="validate(this)">
</BODY>

Or in Mr J's version:-

function chkChar(obj){
obj.value = obj.value.replace(/[^a-z]/gi,'')
}