// update rollover on menu item
function tool_updateObjectCss ( object, css ) {
    document.getElementById ( object ).className = css;
}

// get x position of given object
function tool_getObjectPositionX(object) {
    var left = 0;
    if (object && object.offsetParent){
	// get recursive position of successive parents
	  while (object.offsetParent){
	      left += object.offsetLeft
		object = object.offsetParent;
	  }
    }
    return left;
}

// get y position of given object
function tool_getObjectPositionY(object) {
    var top = 0;
    if (object && object.offsetParent) {
	// get recursive position of successive parents
	  while (object.offsetParent) {
	      top += object.offsetTop
		object = object.offsetParent;
	  }
    }
    return top;
}