function setCookie(c_name,href_url,bar,expiredays){
var exdate=new Date()
exdate.setDate(exdate.getDate()+expiredays)
document.cookie=c_name+ "=" +escape(href_url)+ "-"+ escape(bar);
//alert(document.cookie)
((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 delCookie(name) {
    var exp = new Date();
    exp.setTime(exp.getTime() - 1);
    var cval=getCookie(name);
    if(cval!=null) {
		document.cookie= name + "="+cval+";expires="+exp.toGMTString();
	}
}