// JavaScript Document

//モーダルウィンド
function first(){
	var first=getCookie('first');
	if(first==false || first==null){
		setCookie('first','false',30);
		document.write("<div id='over' class='iepngfix' style='width:100%;background-image:url(img/bg.png);position:absolute;top:0;'></div>");
		document.write("<div id='modal' style='position:absolute;'><img src='img/first.png' width='510' height='310' class='iepngfix' /><a href='javascript:delObj();'  style='position:absolute;top:230px;left:200px;'><img src='img/btn_close.jpg' width='104' height='30' style='border:none;' /></a></div>");
		modPosCenter('modal',510,310);
		modOverray();
	}
}
function modPosCenter(tgtName,w,h){
	var WW=document.documentElement.clientWidth/2;
	var WH=document.documentElement.clientHeight/2;
	var myObj=document.getElementById(tgtName).style;
	myObj.left=WW-(w/2)+'px';
	myObj.top=WH-(h/2)+'px';
}
//オーバーレイの補正
function modOverray(){
	var scH=document.body.scrollHeight;
	document.getElementById('over').style.height=scH+'px';
}
function delObj(){
	var myObj=document.getElementById('modal');
	var myObj_parent=myObj.parentNode;
	myObj_parent.removeChild(myObj);
	var myObj=document.getElementById('over');
	var myObj_parent=myObj.parentNode;
	myObj_parent.removeChild(myObj);
}

//Cookie
function setCookie(myCookie,myValue,myDay){
   myExp = new Date();
   myExp.setTime(myExp.getTime()+(myDay*24*60*60*1000));
   myItem = "@" + myCookie + "=" + escape(myValue) + ";";
   myExpires = "expires="+myExp.toGMTString();
   document.cookie =  myItem + myExpires;
}

function getCookie(myCookie){
   myCookie = "@" + myCookie + "=";
   myValue = null;
   myStr = document.cookie + ";" ;
   myOfst = myStr.indexOf(myCookie);
   if (myOfst != -1){
      myStart = myOfst + myCookie.length;
      myEnd   = myStr.indexOf(";" , myStart);
      myValue = unescape(myStr.substring(myStart,myEnd));
   }
   return myValue;
}