var cnt = 0;
var n =- 1;
var myArray = new Array;
var btnImg1 = "images/ad/btn_detail_close.gif";
var btnImg2 = "images/ad/btn_detail_open.gif";

function displayEvent(){
	var btnArray = document.getElementsByTagName("img");
	var divArray = document.getElementsByTagName("div");
	//alert(btn.length);

	for (var i = 0, ln = divArray.length; i < ln; i++) {
		if(divArray[i].className == "detail"){
				divArray[i].style.display = "none";
				myArray.push(divArray[i]);
		}
	}

	for (var i = 0, ln = btnArray.length; i < ln; i++) {
		if(btnArray[i].className == "btnEvent"){
				n++;
				new mouseEvent(myArray[n],btnArray[i],n);
		}
	}
}

function mouseEvent(elm,btn,n){
	
	btn.onmousedown = function() {
		if(cnt == 0){
			myArray[n].style.display = "block";
			btn.setAttribute("src",btnImg1);
			btn.setAttribute("alt","閉じる");
			cnt = 1;
			
		}else if(cnt == 1){
			myArray[n].style.display = "none";
			btn.setAttribute("src",btnImg2);
			btn.setAttribute("alt","詳細を見る");
			cnt = 0;
			
		}
	};
}