function setcookie(ck,exp) {
	var n,v ;
	if( exp == 0 ) exp = "expires=Thu, 1-Jan-2030 00:00:00 GMT;" ;
	else exp = "expires="+exp+";" ;

	for(n in ck ) {
		v = ck[n] ;
		if(isNaN(v))  v = escape(v) ;
		document.cookie = n+"="+v+"; "+exp ;
	}
}

function getcookie() {
	var c = document.cookie+";" ;
	var a = {} ;
	while(c.match(/([^= ]+)=([^;]+);/) ){
		a[RegExp.$1] = unescape(RegExp.$2) ;
		c=RegExp.rightContext ;
	}
	return a ;
}

function clearcookie(key) {
    document.cookie = key + "=x; expires=Tue, 1-Jan-1980 00:00:00 GMT;";
}