function showImage(whatImage,imgWidth,imgHeight)
{
	var winW = parseInt(imgWidth) + 40;
	var winH = parseInt(imgHeight) + 60;
	grabBig(whatImage);
	changeObjectVisibility('imageWindow','visible',11);
	var H = getHeight();
	var Hspace = Math.round((H - winH)/2);
	var W = getWidth();
	var Lft = Math.round((W - winW)/2);
	var ScrollTop = document.body.scrollTop;
	if (ScrollTop == 0)
	{
	  if (window.pageYOffset)
		{
			ScrollTop = window.pageYOffset;
			if(Hspace > 0){ScrollTop += Hspace;}
		}
   	else
		{
      ScrollTop = (document.body.parentElement) ? document.body.parentElement.scrollTop : 0;
			if(Hspace > 0){ScrollTop += Hspace;}
		}
	}
	ScrollTop += 'px';
	winW += 'px';
	winH += 'px';
	Lft += 'px';
	var styleObject = getStyleObject('imageWindow');
	styleObject.width=winW;
	styleObject.height=winH;
	styleObject.top=ScrollTop;
	styleObject.left=Lft;
}

function hideBig()
{
	document.getElementById('bigImage').src = '/sch-graphics/loading.gif';
	changeObjectVisibility('imageWindow','hidden',1);
	var styleObject = getStyleObject('imageWindow');
	var Tp = -660;
	var Lft = -840;
	//if (window.pageYOffset)
	//{
			Tp += 'px';
			Lft += 'px';
	//}
	styleObject.top = Tp;
	styleObject.left = Lft;
}

function grabBig(whatImage)
{
	loadPath = imagePath + whatImage;
	document.getElementById('bigImage').src = loadPath;
}