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BOOK: Beginning JavaScript
This is the forum to discuss the Wrox book Beginning JavaScript by Paul Wilton; ISBN: 9780764544057
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Old November 29th, 2005, 06:09 PM
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Default how to detect the Enter-key in a text box ?

Hi, I am new to javascript and just working my way through 'Beginning Javascript' so bear with me. If you hit the Enter-key in a text box having entered several characters, the text vanish and any validation of the content of the text box is not possible (at least to me).
I have tried to detect the Enter-key (and other white space characters) like this:

.................................................. ....
<html>
<head>
<title>ENTER_test</title>
<script type="text/javascript" language="Javascript">
<!--
function checkKey()
{
    var str=document.form1.tekst1.value;
// alert(str);
    var regExp = /\s/g;
    if (regExp.test(str) == true)
    {
        alert("a white space character has been entered");
    }
}

function window_onload()
{
    document.form1.tekst1.focus();
}
//-->
</script>
</head>

<body language=Javascript onLoad="window_onload()">
<form name=form1>
<input type=text name=tekst1 value=""
 onkeypress="checkKey()">
<input type=button name=cmd1 value="button">
</form>
</body>
</html>
.................................................. ......

I suppose the Enter-key never reach my checkKey().What is going on? and how do I prevent this behaviour of the Enter-key? (It is quite common for a lot of users to end input of text in a text box with Enter instead of Tab)

I appreciate any answers
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Old November 30th, 2005, 07:28 AM
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is this any use?
http://p2p.wrox.com/topic.asp?TOPIC_ID=3672
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Old November 30th, 2005, 08:22 AM
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Default

Yes - I could definitely use that hint.(But I can see that I need to find/know something about the Event-object??). Thank you. Meanwhile I have been on the WEB and found this solution (I suppose it's essential the same thing going on as in your solution):

<body>
<form name=form1>
<input type=text name=tekst1 value=""
 onkeypress="{if (event.keyCode==13)event.returnValue=false;}">
</form>

This will work for the text box - and in the textarea box you just omit the onkeypress thus making the Enter-key a valid key.......
SteenH
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