/* USER_AGENT check start ------------------------------------------------ */
// NN4, NN5(Netscape 6+, Mozilla 1+?), IE4(IE4+), Unknown
g_USER_AGENT = getAgent();

// return NN4, NN5(Netscape 6+, Mozilla 1+?), IE4, IE5(IE5+), Unknown
function getAgent(){
  var userAgent = navigator.userAgent;
  var charIndex;
  var majorVersion;

  charIndex = userAgent.indexOf("MSIE");
  if(charIndex){
    majorVersion = userAgent.charAt(charIndex + 4 + 1);
    if(majorVersion > 4){
      return("IE5");
    }
    else if(majorVersion == 4){
      return("IE4");s
    }
  }

  charIndex = userAgent.indexOf("Mozilla");
  majorVersion = userAgent.charAt(charIndex + 7 + 1);
  if(majorVersion > 4){
    return("NN5");
  }
  else if(majorVersion == 4){
    return("NN4");
  }

  return("Unknown");
}
/* USER_AGENT check end -------------------------------------------------- */

function getWindowYOffset(){
  if(g_USER_AGENT == "IE5" || g_USER_AGENT == "IE4"){
    return document.body.scrollTop;
  }else if(g_USER_AGENT == "NN5" || g_USER_AGENT == "NN4"){
    return window.pageYOffset;
  }else{
    return 0;
  }
}

var waitTimer;
function jumpTo(dstY, srcY, scrollRate, waitMillSec) {
  if(waitTimer){
    clearTimeout(waitTimer);
  }
  if( ! dstY || dstY < 0 ){
    dstY = 0;
  }
  if( ! srcY ){
    srcY = 0 + getWindowYOffset();
  }
  if( ! scrollRate ){
    scrollRate = 5;
  }
  if( ! waitMillSec ){
    waitMillSec = 20;
  }

  srcY += (dstY - getWindowYOffset()) / scrollRate;
  if(srcY < 0){
    srcY = 0;
  }
  posY = Math.floor(srcY);
  window.scrollTo(0, posY);

  if(posY != dstY){
    waitTimer = setTimeout("jumpTo("+ dstY +", "+ srcY +", "+ scrollRate +", "+ waitMillSec +")", waitMillSec);
  }
  else if(posY == dstY){
    clearTimeout(waitTimer);
  }
  else if(posY < 1){
    window.scroll(0, 0);
  }
}

function toTop(){
  jumpTo(0, 0, 7, 14);
}


function moveY(id_name){ 
   obj = document.getElementById(id_name); 
   y = obj.offsetTop; 
   scrollTo(0,y-160); 
}



/*
myOP = window.opera;            // OP
myN6 = document.getElementById; // N6
myIE = document.all;            // IE
myN4 = document.layers;         // N4

if      (myOP) myBR="O6";
else if (myIE) myBR="I4";
else if (myN6) myBR="N6";
else if (myN4) myBR="N4";
else myBR="";
*/
var myIconX = 32;
var myIconY = 54;



function myCheck(){
	// return NN4, NN5(Netscape 6+, Mozilla 1+?), IE4, IE5(IE5+), Unknown
	//NN5 : google Chrome / FireFox / Safari
	//IE5 IE5-8
  
  if(g_USER_AGENT == "IE5" || g_USER_AGENT == "IE4"){
	  
	 myObj = document.all["pagetop"].style;
	 
	 
  }else if(g_USER_AGENT == "NN5"){
	  
     myObj = document.getElementById("pagetop").style;
	 
  }else if(g_USER_AGENT == "NN4"){
	  
	 myObj = document["pagetop"];
  }
  
    myMain();

}

function myMain(){	

  if(g_USER_AGENT == "IE5" || g_USER_AGENT == "IE4"){
	 myObj.left = document.documentElement.clientWidth/2 + 515 - myIconX+"px";
	 myObj.top = document.documentElement.clientHeight - myIconY - 15+"px";
  }else if(g_USER_AGENT == "NN4" ||g_USER_AGENT == "NN5"){
    myObj.left = (window.pageXOffset + innerWidth/2 + 515- myIconX)+"px";
    myObj.top  = (window.pageYOffset + innerHeight - myIconY)+"px";
  }
  //setTimeout("myMain()",300);
}

window.onresize = function() {
	myCheck();
}