var scrSkyFirstRun;
var scroSkyOldPos;
var down = false;
var wallpaper = document.getElementById('wallpaper_right');
var wallpaperMarginTop;

try {
	wallpaperMarginTop = wallpaper.style.marginTop;
} catch(e) {
	wallpaperMarginTop = '-90px';
}

function scroSkyScrollSky(pos){
	if (typeof scrSkyFirstRun=="undefined"){
		scroSkyOldPos=pos;
		scrSkyFirstRun=true;
	}
	var scroSkyScrollTop=document.documentElement.scrollTop?document.documentElement.scrollTop:document.body.scrollTop||window.pageYOffset||0;
	if (scroSkyScrollTop > 90) {
		scroSkyScrollTop = scroSkyScrollTop-85;
		down = true;
		try {
			wallpaper.style.marginTop = '0px';
		} catch(e) { } 
	} else {
		if (down == true) {
			try {
				wallpaper.style.marginTop = wallpaperMarginTop;
			} catch(e) { } 
			down = false;
		}
	}
	var scroSkyY=scroSkySkyLayerDiv.offsetTop;
	var s=-.25*(scroSkyY-scroSkyScrollTop);
	s=s>0?Math.ceil(s):Math.floor(s);
	if(scroSkyY+s>scroSkyOldPos){
		scroSkySkyLayerDiv.style.top=scroSkyY+s+"px";
	}else{
		scroSkySkyLayerDiv.style.top=scroSkyOldPos+"px";
	}
	setTimeout("scroSkyScrollSky()",30);
};
var scroSkySkyLayerDiv = document.getElementById("skyscraper");
scroSkyScrollSky(0);