$(document).ready(function() {
	var heightPage = $(window).height();
	var heightReduction = $("#wrapper").height();
	var heightFooter = heightPage - heightReduction;
	
	if (heightFooter > 200) {
		$("footer").css("height", heightFooter);
	}
});

$(window).resize(function() {
	var heightPage = $(window).height();
	var heightReduction = $("#wrapper").height();
	var heightFooter = heightPage - heightReduction;
	
	if (heightFooter > 200) {
		$("footer").css("height", heightFooter);
	}
});