var index = new Object({
	defaultAction : function(){
		index.change();
		index.trendWord.defaultAction();
	},
	change : function(){
		var changeArray = new Array(
			document.getElementsByTagName('h2'),
			document.getElementById('changeImg').getElementsByTagName('a')
		);
		var changeSrcArray =new Array(
			'images/top_m0',
			'images/top_mn0'
		);
		for (i=0; i<changeArray.length; i++) {
			for (i2=0; i2<changeArray[i].length; i2++) {
				changeArray[i][i2].innerHTML = '<img src="'+changeSrcArray[i]+(i2+1)+'.gif" alt="'+changeArray[i][i2].innerHTML+'" />';
			}
		}
	},
	trendWord : {
		defaultAction : function(){
			index.trendWord.keywords = document.getElementById('trendWord').getElementsByTagName('li');
			for (i=5; i<index.trendWord.keywords.length; i++){index.trendWord.keywords[i].style.display = 'none';}
			var element = document.createElement('div');element.id = 'nav';
			element.innerHTML = '<p class="nowon">&gt;</p><p>&lt;</p>';
			document.getElementById('trendWord').appendChild(element);
			var temp = document.getElementById('nav').getElementsByTagName('p');
			temp[0].onclick = function(){index.trendWord.show('next');};
			temp[1].onclick = function(){index.trendWord.show('prev');};
			index.trendWord.nowon = 'prev';
		},
		show : function(a){
			if(index.trendWord.nowon==a)return;
			for (i=0; i<index.trendWord.keywords.length; i++){
				(i<5)
					?(function(){ index.trendWord.keywords[i].style.display = (a=='prev')?('inline'):('none'); })()
					:(function(){ index.trendWord.keywords[i].style.display = (a=='prev')?('none'):('inline'); })();
			}
			index.trendWord.nowon = a;
			var temp = document.getElementById('nav').getElementsByTagName('p');
			var IEvs = (index.isIE)?('className'):('class');
			(temp[0].getAttribute(IEvs)=='nowon')
				?(function(){ temp[0].removeAttribute(IEvs); temp[1].setAttribute(IEvs, 'nowon');})()
				:(function(){ temp[1].removeAttribute(IEvs); temp[0].setAttribute(IEvs, 'nowon');})();
		}
	},
	isIE : (document.documentElement.getAttribute("style") == document.documentElement.style)
});

items[items.length] = index.defaultAction;