function showImage(boxId, imgName, w, h){
	var box = document.getElementById(boxId);
	var srcStr = "image.php?i=" + imgName;
	box.src = srcStr;
	box.style.width = w + 50;
	box.style.height = h + 100;
	box.style.display = 'block';
}
function hideImg(){
	document.getElementById('imagebox').style.display = 'none';
}