$(document).ready(function() {
    var y_fixo = $("div[id^='div_feedback']").offset().top;
    $(window).scroll(function () {
		var mtScroll = getScrollXY();
        $("div[id^='div_feedback']").animate({top: y_fixo-300+mtScroll[1]+"px"},{duration:500,queue:false});
    });
	
//    $("div[id^='div_feedback_lateral']").click(
//            function() {
//				if($("div[id^='div_feedback']").css('left') == "0px")
//					//$(this).css({right:-180});
//					$("div[id^='div_feedback']").animate({left:-182},400);
//				else
//	                //$(this).css({right:0});
//					$("div[id^='div_feedback']").animate({left:0},400);
//            }
//        );
});

function getScrollXY() {
	var scrOfX = 0, scrOfY = 0;
	if( typeof( window.pageYOffset ) == 'number' ) {
		//Netscape compliant
		scrOfY = window.pageYOffset;
		scrOfX = window.pageXOffset;
	} else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
		//DOM compliant
		scrOfY = document.body.scrollTop;
		scrOfX = document.body.scrollLeft;
	} else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
		//IE6 standards compliant mode
		scrOfY = document.documentElement.scrollTop;
		scrOfX = document.documentElement.scrollLeft;
	}
	return [ scrOfX, scrOfY ];
}