$(function(){
	// portfolio dropdown
	$('#portfolio-dropdown').change(function(){
		location.href = $(this).val();
	});
	

	// call function on dom ready and on resize
	centerTag();
	window.onresize = centerTag;
	
});
 

// Center tag function 
function centerTag() 
{
	var height = $('#content #contact').height();
	var windowHeight = window.innerHeight;
	var windowCenter = Math.round(windowHeight/2);
	var marginTop = windowCenter - (height/2);
	$('#content #contact').css({
		'margin-top': marginTop
	});
}