ESP8266: LED-Matrix Control by Webinterface: Update 1

After scripting around some evenings with CSS, HTML ans JavaScript, the following website turned out:

Now I am able to change the size of the matrixand the color of each pixel. For testing the results of the software, I rapidly build a little matrix, which consists of four WS2812 LEDs:

And i think... this will be a nice project... especially if i can control my "large" LED matrix with 6x9 pixels..