/* astor js */

function scrollNav(){
	if(document.getElementById){
		if( typeof( window.pageYOffset ) == 'number' ) {
			//Non-IE
			document.getElementById('nav-service').style.bottom = '-'+window.pageYOffset+'px';
		} else if( document.documentElement && document.documentElement.scrollTop ) {
			//IE 6+ in 'standards compliant mode'
			document.getElementById('nav-service').style.bottom = '-'+document.documentElement.scrollTop+'px';
//			y = document.documentElement.scrollTop;
		}
//		 else if( document.body && document.body.scrollTop ) {
//			//IE 4 compatible
//			y = document.body.scrollTop;
//		}
	}
}

window.onscroll = scrollNav;