function presentation(){
	var pics = document.getElementById('pics');
	var pic = pics.getElementsByTagName('a');
	var tmp = new Array();
	for(var i=0;i<pic.length;i++){
		tmp[i] = new Image();
		tmp[i].src = pic[i].href;
		pic[i].onclick=function(){
			show(this);
		}
	}
}
function show(a){
	var pics = document.getElementById('pics');
	var picbox = document.createElement('div');
	picbox.setAttribute("id", "picbox");
	var hideA =document.createElement('a');
	hideA.href="#pics";
	var img = document.createElement('img');
	img.src = 'images/'+a.getElementsByTagName('img')[0].src.substr(a.getElementsByTagName('img')[0].src.lastIndexOf('/'));
	pics.appendChild(picbox).appendChild(hideA).appendChild(img);
	a.href='#picbox';
        hideA.onclick=function(){
		this.parentNode.parentNode.removeChild(this.parentNode);
	}

}
window.onload=function(){
	presentation()
}