$(document).ready(function(){
	
	function f_clientWidth() {
		return f_filterResults (
			window.innerWidth ? window.innerWidth : 0,
			document.documentElement ? document.documentElement.clientWidth : 0,
			document.body ? document.body.clientWidth : 0
		);
	}
	
	function f_scrollTop() {
		return f_filterResults (
			window.pageYOffset ? window.pageYOffset : 0,
			document.documentElement ? document.documentElement.scrollTop : 0,
			document.body ? document.body.scrollTop : 0
		);
	}
	
	function f_filterResults(n_win, n_docel, n_body) {
		var n_result = n_win ? n_win : 0;
		if (n_docel && (!n_result || (n_result > n_docel)))
			n_result = n_docel;
		return n_body && (!n_result || (n_result > n_body)) ? n_body : n_result;
	}
	
	var leftValue = ((f_clientWidth() - 910)/2)+522;
	$("#portfolioList").css({left: leftValue});
	
	var topValue = $("#portfolioList").css("top");
	if(f_scrollTop() >= parseInt(topValue)){
	$("#portfolioList").css({position: 'fixed', top: '0px'});
	}
	if(f_scrollTop() <= parseInt(165)){
	$("#portfolioList").css({position: 'absolute', top: '165px'});
	}

	$(window).scroll(function(){
	var topValue = $("#portfolioList").css("top");
	if(f_scrollTop() >= parseInt(topValue)){
	$("#portfolioList").css({position: 'fixed', top: '0px'});
	}
	if(f_scrollTop() <= parseInt(165)){
	$("#portfolioList").css({position: 'absolute', top: '165px'});
	}
	});

});