Dec
18
Getting the cursor position inside a text-field and smart ways to build form validators
Filed Under JavaScript, Uncategorized | 1 Comment
I have always wanted a nice clean way to build form validators based on any kind of rule i would choose, however most of the times I stumbled upon a simple problem: How to get the cursor position inside a text-field? It’s easy in Mozilla, but what about IE?
The challenge was weird, but I finally got a way around, starting an idea here.
What I’ve done is I used Prototype to extend the Form Element Methods and simply add a version of selectionStart and selectionEnd for IE. After that, I just put them to work in a nice input wrapper class.
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Dec
18
Quick quide to regular expressions in JavaScript
1. The form of an expression:
var a = /dog/gim
//dog = the expression to match, g = search all matches, i = case insensitive, m=multiple line
The cool thing is that /dog/ is an object, so you can, for example, do something like /dog/.test(something)
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May
29
Cool trick to extract only what you need using regular expressions
Filed Under JavaScript, PHP, Programming | 2 Comments
I have a lot of article drafts sitting unused in my WP DB and I’ve decided to release them even though I don’t have very much time to get into details.
Here’s one of them.
I always comment the code I write like:
// Bogdan -> initializing dispatcher $this->dispatcher->init(); //-
Very often I’m required to extract the parts of the code I wrote, even though they are not full functions or classes, but just simple variables, or…
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May
7
IE Object required error and other common coding mistakes
Filed Under JavaScript, Programming | 3 Comments
Been having a lot of work on customizing Dokeos for a client, so didn’t really have any spare time to write. 
This post is about common mistakes or overlooks when developing RIAs with JavaScript.
First of all, something to always keep in mind when working with Internet Explorer: it will never ever act like you wish from the first time.
Pay extra attention especially when dealing with DOM elements, as it tends to throw errors that FF doesn’t - I’m not talking about the fact that IE is not DOM compliant and methods that work in Mozilla family browsers don’t exist in IE or have different names.
Here’s a list of things to remember:
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Apr
22
Simulating mouse clicks in JavaScript
Filed Under JavaScript, Programming | 13 Comments
There might 
be times when you would like to simulate a mouse click on an DOM Node and don’t know how (for instance, submitting a form when in multi-frame environment).
Furthermore, it would be nice if the functionality could extend the DOM, so as to be able to use it combined with other pre-existing features.
Here’s the script bellow, just added and use it as you please (Ex. document.getElementById(”my_element”).click();)
HTMLElement.prototype.click = function() {
var evt = this.ownerDocument.createEvent('MouseEvents');
evt.initMouseEvent('click', true, true, this.ownerDocument.defaultView, 1, 0, 0, 0, 0, false, false, false, false, 0, null);
this.dispatchEvent(evt);
}
}