/* 
 * 2011年07月21日 - h1de -
 *
 * 2011-07-21 add scroll top tools
 * 
 */

/*scroll top*/
lastScrollY=0;
function heartBeat(){
    var diffY;

    if (document.documentElement && document.documentElement.scrollTop)
        diffY = document.documentElement.scrollTop;
    else if (document.body)
        diffY = document.body.scrollTop
    else
        {/*Netscape stuff*/}
    percent = .1*(diffY-lastScrollY);

    if(percent>0)percent = Math.ceil(percent);
    else percent = Math.floor(percent);
    document.getElementById("scrollTools").style.top = parseInt(document.getElementById("scrollTools").style.top)+percent+"px";
    lastScrollY = lastScrollY+percent;
    if(diffY > 500){
        document.getElementById("scrollTools").style.display = "block"
    }else{
	document.getElementById("scrollTools").style.display = "none"
    }
}

suspendcode =
"<div id=\"scrollTools\"\n\
 style='display:none;\n\
 width:15px;\n\
 height:57px;\n\
 POSITION:absolute;\n\
 left:77%;\n\
 top:460px;\n\
 margin-left:200px;\n\
  z-index:100;\n\
 text-align:center;'>\n\
<a href='#'><img src='/images/top.png' border=0 width='30' height='33' /></a>\n\
</div>"
document.write(suspendcode);
window.setInterval("heartBeat()",1);
/*scroll top*/