Bug 681192. Part 14: Fix test to avoid failure due to event coordinate rounding. r=matspal

function submitFormMouse(idNum) {

  $("test"+idNum).setAttribute("onload", "frameLoaded(this)");

  synthesizeMouse($("test" + idNum + "image"), 5, 5, {});

  // Use 4.999 instead of 5 to guard against the possibility that the

  // image's 'top' is exactly N + 0.5 pixels from the root. In that case

  // we'd round up the widget mouse coordinate to N + 6, which relative

  // to the image would be 5.5, which would get rounded up to 6 when

  // submitting the form. Instead we round the widget mouse coordinate to

  // N + 5, which relative to the image would be 4.5 which gets rounded up

  // to 5.

  synthesizeMouse($("test" + idNum + "image"), 4.999, 4.999, {});

}

addLoadEvent(function() {