$(document).ready(function(){
	
	 var vcenter = function(){
		 if (typeof(firstpage) != 'undefined'){
			var displayablecontent = 600;
			var winheight = $(window).height();
			var padding = winheight/2 - displayablecontent/2;
			$("body").css('padding-top', padding + 'px');
		}
	}
	
	 vcenter();	
	 $(window).resize( function() { 
		vcenter();						  
	 });
	
});