Guys, Ive been using jquery to do this, but now I need to do it with Prototype and Im little confused due lack of documentation
I have 2 lists of check boxes
First List:
Check box 1
Check box 2
Second list:
Check box x
check box y
check box z
I need the JS code, using prototype to work like this: Second list, remains disabled unless I check one of the checkboxes of the First List.
Any suggestions, or help, please!
Thankyou.
Here's the JavaScript code:
Event.observe(window, 'load', function(){
// for all items in the group_first class
$$('.group_first').each(function(chk1){
// watch for clicks
chk1.observe('click', function(evt){
// count how many of group_first
// are checked, true if any are checked
var doEnable = ($$('.group_first:checked').length > 0);
// for each in group_second, enable the
// checkbox, and remove the cssDisabled class
$$('.group_second').each(function(item){
if (doEnable) {
item.enable().up('label').removeClassName('cssDisabled');
} else {
item.disable().up('label').addClassName('cssDisabled');
}
});
});
});
});
Based on this HTML:
<fieldset>
<legend>First Group</legend>
<label><input type="checkbox" value="1"
class="group_first" />Check box 1</label><br />
<label><input type="checkbox" value="2"
class="group_first" />Check box 2</label>
</fieldset>
<fieldset>
<legend>Second Group</legend>
<label class="cssDisabled"><input type="checkbox" value="x"
class="group_second" disabled="disabled" />Check box x</label><br />
<label class="cssDisabled"><input type="checkbox" value="y"
class="group_second" disabled="disabled" />Check box y</label><br />
<label class="cssDisabled"><input type="checkbox" value="z"
class="group_second" disabled="disabled" />Check box z</label>
</fieldset>
Add this CSS:
.cssDisabled { color: #ccc; }
The documentation for Prototype is very good. Here's the methods I'm using:
For those of you interested in how this can be done in jQuery:
jQuery(document).ready(function(){
$('.group_first').bind('click', function(){
var doEnable = ($('.group_first:checked').length > 0);
$('.group_second').each(function(){
if (doEnable) {
$(this).attr('disabled', null);
$(this).parents('label').removeClass('cssDisabled');
} else {
$(this).attr('disabled', 'disabled');
$(this).parents('label').addClass('cssDisabled');
}
});
});
});
This is the test code Ive build and checking the 1st group checkboxes are not enabling group 2 checkboxes
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
<head>
<title>toggle disabled</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<script src="prototype.js" type="text/javascript">
<script type="text/javascript">
var checkboxes = $$('input[name="group1"]');
checkboxes.each(function(s) {
s.observe('click', function() {
if(this.checked) {
$$('input[name="group2"]').each(function(s) {
s.enable();
});
} else {
if(!$$('input[name="group2"][checked="checked"]').length) {
alert('nothing checked');
$$('input[name="group2"]').each(function(s) {
s.disable();
});
}
}
});
});
</script>
</head>
<body>
<div>
<label> Group 1 </label>
<input type="checkbox" name="group1" value="test"/>
<input type="checkbox" name="group1" value="test"/>
<input type="checkbox" name="group1" value="test"/>
</div>
<div>
<label> Group 2 </label>
<input type="checkbox" name="group2" disabled="disabled"/>
<input type="checkbox" name="group2" disabled="disabled"/>
<input type="checkbox" name="group2" disabled="disabled"/>
</div>
</body>
</html>