大约有 16,000 项符合查询结果（耗时：0.0280秒） [XML]
Check image width and height before upload with Javascript
...w Image();
var objectUrl = _URL.createObjectURL(file);
img.onload = function () {
alert(this.width + " " + this.height);
_URL.revokeObjectURL(objectUrl);
};
img.src = objectUrl;
}
});
Demo: http://jsfiddle.net/4N6D9/1/
I take it you real...
Detect Click into Iframe using JavaScript
... "\n";
console.value = text;
}
function attachOnloadEvent(func, obj) {
if(typeof window.addEventListener != 'undefined') {
window.addEventListener('load', func, false);
} else if (typeof document.addEventListener != 'undefined') {
...
how to stop browser back button using javascript
... example) in a web app where back/forward didn't really make sense anyway. Confirmed disables back and forward functionality (tho not the buttons themselves), including context menu option; verified in IE8 thru IE11, Chrome & FF.
– nothingisnecessary
Jan 29...
Warn user before leaving web page with unsaved changes
...ll string:
window.addEventListener("beforeunload", function (e) {
var confirmationMessage = 'It looks like you have been editing something. '
+ 'If you leave before saving, your changes will be lost.';
(e || window.event).returnValue = confirmationMessage; //Gec...
JavaScript: Get image dimensions
...
var img = new Image();
img.onload = function(){
var height = img.height;
var width = img.width;
// code here to use the dimensions
}
img.src = url;
share
|
...
How to validate an email address using a regular expression?
...of validation that involves sending that address a message that includes a confirmation token meant to be entered on the same web page as was the address.
Confirmation tokens are the only way to know you got the address of the person entering it. This is why most mailing lists now use that mechani...
jQuery callback on image load (even when the image is cached)
...n-DOM image object? If it's cached, this will take no time at all, and the onload will still fire. If it isn't cached, it will fire the onload when the image is loaded, which should be the same time as the DOM version of the image finishes loading.
Javascript:
$(document).ready(function() {
va...
How to render a PDF file in Android
...e)
.enableDoubletap(true)
.defaultPage(0)
.onDraw(onDrawListener)
.onLoad(onLoadCompleteListener)
.onPageChange(onPageChangeListener)
.onPageScroll(onPageScrollListener)
.onError(onErrorListener)
.enableAnnotationRendering(false)
.password(null)
.scrollHandle(null)
.load();
...
When to use os.name, sys.platform, or platform.system?
...
I wonder if we can get any Python developers to confirm this. Maybe even whoever developed the platform module.
– ztangent
Dec 30 '10 at 2:59
add a ...
Is there a cross-browser onload event when clicking the back button?
For all major browsers (except IE), the JavaScript onload event doesn’t fire when the page loads as a result of a back button operation — it only fires when the page is first loaded.
...