function setCookie(c_name,value,expiredays) {
	var exdate=new Date();
	exdate.setDate(exdate.getDate()+expiredays);
	document.cookie=c_name+ "=" +escape(value)+
	((expiredays==null) ? "" : ";expires="+exdate.toGMTString());
}
function getCookie(c_name) {
	if (document.cookie.length>0) {
		c_start=document.cookie.indexOf(c_name + "=");
		if (c_start!=-1) {
		c_start=c_start + c_name.length+1;
		c_end=document.cookie.indexOf(";",c_start);
		if (c_end==-1) c_end=document.cookie.length;
		return unescape(document.cookie.substring(c_start,c_end));
		}
	}
	return "";
}
function refColor() {
	colorpref = getCookie('color');
	if (colorpref) {
		document.getElementById(themeDivId).href = themeDir+colorpref+".css";
	}
} 
function sT(themeId) {
	setCookie(cookieName,themeId,cookieExpireDays);
	refColor();
}