function getMouseCoordsWithinEventTarget(event)
{
var coords = { x: 0, y: 0};
if(!event) // then we have a non-DOM (probably IE) browser
{
event = window.event;
coords.x = event.offsetX;
coords.y = event.offsetY;
}
else // we assume DOM modeled javascript
{
var Element = event.target ;
var CalculatedTotalOffsetLeft = 0;
var CalculatedTotalOffsetTop = 0 ;
while (Element.offsetParent)
{
CalculatedTotalOffsetLeft += Element.offsetLeft ;
CalculatedTotalOffsetTop += Element.offsetTop ;
Element = Element.offsetParent ;
}
coords.x = event.pageX - CalculatedTotalOffsetLeft ;
coords.y = event.pageY - CalculatedTotalOffsetTop ;
}
return coords;
}
