function findPos(obj)
{
	var curleft = curtop = 0;
	if (obj.offsetParent)
	{
		curleft = obj.offsetLeft
		curtop = obj.offsetTop
		while (obj = obj.offsetParent)
		{
			curleft += obj.offsetLeft
			curtop += obj.offsetTop
		}
	}
	return [curleft,curtop];
}

var pyramidCategories = new Array("grains", "vegetables", "fruit", "milk", "meat");

function hideSliders() {
	for (i = 1; i < pyramidCategories.length; i++) {
		document.getElementById(pyramidCategories[i]).style.display = "none";
		document.getElementById(pyramidCategories[i] + "Img").src = "/images/mypyramid/mypyramid/" + pyramidCategories[i] + "_off.jpg";		
	}
}

function displayPyramidCategory(categoryType) {
	for (i = 0; i < pyramidCategories.length; i++) {
		var current = pyramidCategories[i];
		var currentImg = current + "Img";
		if (document.getElementById(current).style.display != "none" && current != categoryType) {
			new Effect.BlindUp(current);
			document.getElementById(currentImg).src = "/images/mypyramid/mypyramid/" + current + "_off.jpg";
		}
	}
	new Effect.BlindDown(categoryType);
	document.getElementById(categoryType + "Img").src = "/images/mypyramid/mypyramid/" + categoryType + "_on.jpg";
}