Problem with checkboxes and javascript

davidlh

Hello, I'm writing a program where a user will click on a table cell and if the checkbox contained therein isn't already checked, it will check it...for some reason, my code isn't doing the trick. Any help will be appreciated!

...
<script language="javascript" type="text/javascript">

function checkBoxes(id){
     if(id.checked == false)
     {
          alert("Not Checked!);
     }
}
</script>

Now to the PHP!
Assume $id[$x] = 19;

echo "<td onClick=\"checkBoxes($id[$x])\"><input type=\"checkbox\" name=\"$id[$x]\" id=\"$id[$x]\" value=\"delete\" />Example</td>";

Any thoughts?

sibiraj

is this ok............

<html>
<head>
<script language="javascript">
function ch(form)
{
alert(form.x.checked);
}
</script>
</head>
<body>
<?php $val=19; ?>
<form>
<input type="checkbox" name="x" value="<?php echo $val; ?>" onclick="ch(this.form)" />
</form>
</body>
</html>

davidlh

@ thanks for the reply, but the purpose of my code is to check if id=$id[$x] is checked and if it is not, then check it (but in the code I've provided, it will display an alert box).

I may be wrong but I don't think the code you've shown does the same thing.

sibiraj

i thing your question is similer to this

there is two checkbox and if the checkbox value is there in the database and the checkbox is being checked. otherwise not checked.

?????????????????????????????????????

davidlh

there is no checkbox value stored in a database? Also, the code you've written doesn't even use an if statement to check if the box is checked...

davidlh

Ok, so I've actually tested your code and whatnot, and that works to check if it's true, but how do I check if it's false?

function ch(form)
{
if(form.x.checked == false){
alert("It is not checked!");
form.x.checked = true;
}
}

that's not working for me

davidlh

Also, I've written this code

function checkBoxes(id, form){
if(!id.checked){
	alert(id.checked);
	}
}

and the alert box says "undefined" why is this? Assume that id=19...

davidlh

And the alert will popup whether the button is checked or not...

sibiraj

}
</script>

this is ok yaaaaaaaaaaaar

sibiraj

the javascript is not identify the name you give as id. like [].............

davidlh

The thing is, the id is dynamic...

Terminator

And this ?

<script language="javascript" type="text/javascript">

function checkBoxes(element){
    if (document.getElementById(element).checked == false)
     {
          alert("Not Checked!);
     }
}
</script>

echo "<td onClick=\"checkBoxes($id[$x])\"><input type=\"checkbox\" name=\"$id[$x]\" id=\"$id[$x]\" value=\"delete\" />Example</td>";