var ilst = new Array(
	"umi_0.css",
	"umi_1.css",
	"umi_2.css",
	"umi_3.css",
    "umi_4.css",
	"umi_6.css",
	"umi_7.css"
);
var rndno = Math.floor((Math.random() * 100)) % ilst.length;
var output ='<link rel="stylesheet" type="text/css" href="http://www.bestex-consulting.com/css_umi/' + ilst[rndno] +'">';
document.write(output);