window.onscroll = function() {
    if( window.XMLHttpRequest ) {
		var wholeHeaderOffset1 = 160;
		
        if (document.documentElement.scrollTop > wholeHeaderOffset1 || self.pageYOffset > wholeHeaderOffset1) {
            $('#social_buttons').css('position','fixed');
            $('#social_buttons').css('top','10px');
        } else if (document.documentElement.scrollTop < wholeHeaderOffset1 || self.pageYOffset < wholeHeaderOffset1) {
			$('#social_buttons').css('position','static');
            $('#social_buttons').css('top','auto');
        }
    }
}