function posHoverImage(imageWidth, imageHeight, imgId) {
	var margin  = (imageHeight - (imageHeight / 1.5)) / 2 ;
	document.getElementById('hoverImg_' +imgId).style.marginTop = 39 - Math.round(margin) +'px';
}

function showInfoWindow(imageId) {
	var infoWindow = document.getElementById('hoverImgCont_' +imageId);
	
	var divs = document.getElementsByTagName('DIV');
	for(var i=0; i<divs.length; i++) {
		if(divs[i].id != 'hoverImgCont_' +imageId && divs[i].id.indexOf('hoverImgCont_') > -1) {
			divs[i].style.display = 'none';
		}
	}

	infoWindow.style.display = '';
}