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 null
}

function setCookieShop(c_name,value,expiredays){
	var exdate=new Date()
	exdate.setTime(exdate.getTime()+(expiredays*24*3600*1000))
	document.cookie=c_name+ "=" +escape(value)+((expiredays==null) ? "" : "; expires="+exdate)
	}
	
//function checkCookie(){
//	username=getCookie('username')
//	if (username!=null){
//		alert('Welcome again '+username+'!')
//	}else{
//		username=prompt('Please enter your name:',"")
//		if(username!=null||username!=""){
//			setCookie('username',username,365)
//		}
//	}
//}