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())+"; path=/";
}

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 setBackgroundByCookie(){
	bg= getCookie("bkgColor");
	if(bg!=""){
		document.body.style.backgroundColor=bg;
	}
}