javascript - How to implement an onmousedown and onmouseup on an iPhone touch screen

Question

I've very new to HTML/JavaScript but am learning…

I want to make a button on an iPhone that runs a JavaScript command when it is pressed and another when it is released. I tried to do this using onmousedown and onmouseup properties, but this does not work the same on iPhone.

<input type="image" onmousedown="command_press()" onmouseup="command_release()" src="images/UP-Dark.png" alt="" title="" />

Could someone please tell me how to do the same thing on the iPhone?

Answer 1

The equivalent for onmousedown on touchscreen devices is ontouchstart, and the equivalent of onmouseup is ontouchend.

If you would also like to detect dragging, you could use ontouchmove which is fired every time you move your finger after touching the screen.