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How to detect online/offline event cross-browser?
...r agent will
not contact the network when the user
follows links or when a script
requests a remote page (or knows that
such an attempt would fail), and must
return true otherwise.
Finally, the spec notes:
This attribute is inherently
unreliable. A computer can be
connected to a network without ha...
Best way to store JSON in an HTML attribute?
...to attribute sizes.
If you do run into them, then store the data in a <script>. Define an object and map element ids to property names in that object.
What if the JSON contains special characters? (e.g. {test: '<"myString/>'})
Just follow the normal rules for including untrusted d...
click or change event on radio using jquery
...input type="radio" name="radioName" value="2" />two
</form>
<script>
$('#myForm input[type=radio]').change(function() {
alert(this.value);
});
</script>
You must make sure that you initialized jquery above all other imports and javascript functions. Because $ is a ...
Check if element is visible in DOM
...e display style property. Just make sure that the element isn't fixed. A script to check this, if you have no position: fixed; elements on your page, might look like:
// Where el is the DOM element you'd like to test for visibility
function isHidden(el) {
return (el.offsetParent === null)
}
...
How do I get the n-th level parent of an element in jQuery?
...
A faster way is to use javascript directly, eg.
var parent = $(innerdiv.get(0).parentNode.parentNode.parentNode);
This runs significantly faster on my browser than chaining jQuery .parent() calls.
See: http://jsperf.com/jquery-get-3rd-level-parent...
Are braces necessary in one-line statements in JavaScript?
...the statement you will need them.
This is perfectly valid
if (cond)
alert("Condition met!")
else
alert("Condition not met!")
However it is highly recommended that you always use braces because if you (or someone else) ever expands the statement it will be required.
This same practice f...
How to get the HTML for a DOM element in javascript
...
If you want a lighter footprint, but a longer script, get the elements innerHTML and only create and clone the empty parent-
function getHTML(who,lines){
if(!who || !who.tagName) return '';
var txt, ax, str, el= document.createElement('div');
el.appendChild...
Prevent form submission on Enter key press
...one radio button . When the enter key is pressed, I want to call my JavaScript function, but when I press it, the form is submitted.
...
How to call a JavaScript function from PHP?
How to call a JavaScript function from PHP?
10 Answers
10
...
Adding a simple UIAlertView
What is some starter code I could use to make a simple UIAlertView with one "OK" button on it?
10 Answers
...