function showImg(img_src, img_width, img_height){
	left = (screen.width/2) - 310;
	zoom_div = document.getElementById('zoom_img');
	zoom_div.style.top = '660px';
	zoom_div.style.left = left+'px';
	zoom_div.style.height = (img_height+20)+'px';
	zoom_div.innerHTML = '<img src="images/gallery/'+img_src+'" width="'+img_width+'" height="'+img_height+'" style="cursor:pointer; border: solid 10px white;" alt="Click to close" onClick="hideImg()" />';
	zoom_div.style.visibility = 'visible';
	Effect.Grow('zoom_img'); 
	return false;
}
function hideImg(){
	zoom_div = document.getElementById('zoom_img');
	Effect.Shrink('zoom_img'); 
	return false;
}