Javascript to ckeck if user enters space in the text field

Question

I want a script which should alert the user if space is entered in the text field.I think it requires javascript.I am writing a script in which i don't want user to enter space in the text fields.

In the registration form which i have created i dont want username to be entered with spaces — , Oct 23 '12 at 18:43

score 1 · Accepted Answer · answered Oct 26 '12 at 06:12

The following function worked

$returnValue = preg_match('/[^a-z^A-Z^0-9]/', $str, $matches);
if ($returnValue==1) 
{
    alert("spaces & symbols are not allowed");
}

Note: It not only restricts spaces but also restricts symbols.

Ravindra Bagale · Answer 2 · 2012-10-23T18:48:49.747

0

use the match() method of strings

<script type="text/javascript">

function checkForm()

    {
    var textb=document.getElementById("textbox1").value;

        if(textb.match(' ')){
           alert('Spaces not allowed!');
           return false;
        }
}

edited Oct 23 '12 at 18:48

answered Oct 23 '12 at 18:43

Ravindra Bagale

17,226
9
43
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how will i specify which textbox to check. – Oct 23 '12 at 18:45
Fatal error: Call to undefined function match() is shown. Can You specify where should i write this script. – Oct 23 '12 at 18:51

score 0 · Answer 3 · answered Oct 24 '12 at 05:11

0

<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript">
$(document).ready( function() {
$("textarea").keypress( function(e) {
if (e.which==32){
alert("spaces are not allowed");
}
});
});
</script>
<textarea></textarea>

answered Oct 24 '12 at 05:11

Heart

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man it alerts that spaces are not allowed but space is included in textarea :( – Heart Oct 24 '12 at 05:12

Javascript to ckeck if user enters space in the text field

3 Answers3