js: attach dynamic css file using javascript.

attach_css_js.js

var filename='http://path/to/your/cssfile.css?' + new Date().getTime();
	var fileref=document.createElement("link");
	fileref.setAttribute("rel", "stylesheet");
	fileref.setAttribute("type", "text/css");
	fileref.setAttribute("href", filename);
	document.getElementsByTagName("head")[0].appendChild(fileref);