function get_randomCssNum(){
	var ranCssNum= Math.floor(Math.random()*1);
	return ranCssNum;
}

function getaCss(){
	var whichCss=get_randomCssNum();
		var cssName=new Array(1)
		cssName[0]="<link rel='stylesheet' type='text/css' href='http://www.tusk-surfboards.com/css/top-bg-4.css' />";
		return cssName[whichCss]
	}
	
document.write(getaCss());