function smartRollover() {
	if(document.getElementsByTagName) {
		var images = document.getElementsByTagName("img");

		for(var i=0; i < images.length; i++) {
			if(images[i].getAttribute("src").match("_off."))
			{
				images[i].onmouseover = function() {
					this.setAttribute("src", this.getAttribute("src").replace("_off.", "_on."));
				}
				images[i].onmouseout = function() {
					this.setAttribute("src", this.getAttribute("src").replace("_on.", "_off."));
				}
			}
		}
	}
}

if(window.addEventListener) {
	window.addEventListener("load", smartRollover, false);
}
else if(window.attachEvent) {
	window.attachEvent("onload", smartRollover);
}


MM_preloadImages(
'http://www.hirayama-g.com/images/common/btn_contact_on.gif',
'http://www.hirayama-g.com/images/common/btn_list_on.gif',
'http://www.hirayama-g.com/images/common/bn_contact_on.jpg',
'http://www.hirayama-g.com/images/index/bn_strongPoint_on.jpg'
);

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}


function a(obj) {
// よくある質問の開閉

// 親のエレメントを取得
  var parent = obj.parentNode;
  var n1 = 0;
  var n2 = 0;

// 子の要素を列挙してチェック
  for (var i=0; i<parent.childNodes.length; i++) {

     if (parent.childNodes[i].className == "faq_title"){
        n1++;
     }
  
     if (obj == parent.childNodes[i]) {
        break;
     }
  }
  
  for (var i=0; i<parent.childNodes.length; i++) {
  
     if (parent.childNodes[i].className == "faq_answer"){
        n2++;
  	  if(n1 == n2){
  	     break;
  	  }
  	  
     }
  }
  
  obj2 = parent.childNodes[i];
  
  if(obj2.style.display == "block"){
    obj2.style.display = "none";
  }else{
     obj2.style.display = "block";
  }

}