$(document).ready(function(){

	$(".rolagem").click(function(event){

		event.preventDefault();

		

		var full_url = this.href;

		

		var parts = full_url.split("#");

		var trgt = parts[1];

		

		var target_offset = $("#"+trgt).offset();

		var target_top = target_offset.top - 170;

		

		$('html, body').animate({scrollTop:target_top}, 500);

	});

});