var PopUpWindow = function(src){
	var obj = document.getElementById('popupwindow');
	var img = new Image();
	var close = document.createElement('div');
	close.className = 'closebutton';
	close.onclick = function(){
		obj.style.display = 'none';
	}
	obj.appendChild(close);
	img.src = src;
	obj.appendChild(img);
	img.onload = function(){
		var clwidth = window.innerWidth || document.body.clientWidth;
		obj.style.top = "40px";
		obj.style.left = parseInt(clwidth/2 - img.width/2)+"px";
	}
}