function backToTop() {
  var x1 = x2 = x3 = 0;
  var y1 = y2 = y3 = 0;
  if (document.documentElement) {
      x1 = document.documentElement.scrollLeft || 0;
      y1 = document.documentElement.scrollTop || 0;
  }
  if (document.body) {
      x2 = document.body.scrollLeft || 0;
      y2 = document.body.scrollTop || 0;
  }
  x3 = window.scrollX || 0;
  y3 = window.scrollY || 0;
  var x = Math.max(x1, Math.max(x2, x3));
  var y = Math.max(y1, Math.max(y2, y3));
  window.scrollTo(Math.floor(x / 2), Math.floor(y / 2));
  if (x > 0 || y > 0) {
      window.setTimeout("backToTop()", 25);
  }
}

function MenuOver(name){
	menuImg = "menu_"+name;
	document.images[menuImg].src = "/support/network/img/common/btn_"+name+"_r.gif";
	}
function MenuOut(name){
	menuImg = "menu_"+name;
	document.images[menuImg].src = "/support/network/img/common/btn_"+name+".gif";
	}

function HowCheckClick(no){
	hiddenNo = "hidCheck"+no;
	checkNo = "check"+no;
	document.images[checkNo].src = checkImgOk.src;
	document.forms["howcheck"].elements["hidCheck"+no].value = "1";
	if(document.forms["howcheck"].elements["hidCheck1"].value && document.forms["howcheck"].elements["hidCheck2"].value && document.forms["howcheck"].elements["hidCheck3"].value){
	document.getElementById('checkLastNo').style.display = "none";
	document.getElementById('checkLast').style.display = "block";
	}
	}
function HowCheckOver(no){
	checkImg = new Image();
	checkImgOk = new Image();
	checkImgR = new Image();
	checkImg.src = "/support/network/img/contents/btn_check.gif";
	checkImgOk.src = "/support/network/img/contents/btn_check_ok.gif";
	checkImgR.src = "/support/network/img/contents/btn_check_r.gif";

	hiddenNo = "hidCheck"+no;
	checkNo = "check"+no;
	if(!document.howcheck.elements[hiddenNo].value){
	document.images[checkNo].src = checkImgR.src;}
	}
function HowCheckOut(no){
	hiddenNo = "hidCheck"+no;
	checkNo = "check"+no;
	if(!document.howcheck.elements[hiddenNo].value){
	document.images[checkNo].src = checkImg.src;}
	}