function getCookie(name) {
     var p = name + "=";
     var si = document.cookie.indexOf(p);
     if (si == -1) return null;
     var ei = document.cookie.indexOf(";", si + p.length);
     if (ei == -1) ei = document.cookie.length;
     return(document.cookie.substring(si + p.length, ei));
}

function gzipHolder() {
	var b = getCookie("pg_size_before");
	var a = getCookie("pg_size_after");
	if (a && b) {
		document.getElementById('gzip').innerHTML = (100 - a / b * 100).toFixed(2) + "%";
		/*
		 document.getElementById('gzip').innerHTML = "[" +
			  "was: " + (b / 1024).toFixed(2) + "Kb" + 
			  "; become: " + (a / 1024).toFixed(2) + "Kb" +
			  "; compression: " + (100 - a / b * 100).toFixed(2) + "%" +
			  "]";
		*/
	}
}