see attached picture. the orange "spinner" icon at the far left is designed to let user control to move the row up or down. It is 19px high. I want to write something like this:
alert('position is '+ (o.offsetY))
<img id="index_1" src="images/buttons/spinner.png" onclick="indexRow(this,event);" height="19" />
Can anyone help with this? thanks!