function Id(id){
	return document.getElementById(id);
}

var news_item;
var news_item_len;

/*** 初期化 ******************************************************************/
// IE
if (window.attachEvent) window.attachEvent("onload", function(){Initialize();});
// それ以外
if (window.addEventListener) window.addEventListener("load", function(){Initialize();}, false);

function Initialize(){
	news_item = $("div.section");
	news_item_len = news_item.length;
	for( var i=5 ; i<news_item_len ; i++ ){
		news_item[i].style.display = "none";
	}
	
	var link = Id("link");
	
	link.innerHTML +="PAGE | ";
	
	for( var i=0 ; i<news_item_len/5 ; i++ ){
		var a = document.createElement("a");
		a.setAttribute("href","#");
		a.innerHTML = i+1;
		(function(n){
			if(window.attachEvent){
				a.attachEvent( "onclick" , function(){HideAndSeek(n*5);} );
			}
			if(window.addEventListener){
				a.addEventListener( "click" , function(){HideAndSeek(n*5);} , false );
			}
		})(i);
		link.appendChild(a);
		var textNode = document.createTextNode(" | ");
		link.appendChild(textNode);
	}
}

function HideAndSeek(ofs){
	for( var i=0 ; i<news_item_len ; i++ ){
		news_item[i].style.display = "none";
	}
	for( var i=ofs ; i<ofs+5 && i<news_item_len ; i++ ){
		news_item[i].style.display = "block";
	}
}