if (screen.availWidth){
	a=(screen.availWidth -750)/2;
	b=(screen.availHeight -580)/2-50;
}else{
	a=0;
	b=0;
}
function doLoad(numimg) {
	window.open(numimg,'','menubar=no,scrollbars=no,resizable=no,width=750,height=580,top='+b+',left='+a);
}
function detail(url) {
	window.open(url,'','menubar=no,scrollbars=yes,resizable=no,width=750,height=580,top='+b+',left='+a);
}
function set_cookie(cookiename,tip) {
	if(document.cookie){
		document.cookie = cookiename+"="+tip+"; path=/";
		window.location.reload();
	}
}
function getCookie(name) {
        var prefix = name + '='
        var cookieStartIndex = document.cookie.indexOf(prefix)
        if (cookieStartIndex == -1)
                return null
        var cookieEndIndex = document.cookie.indexOf(';', cookieStartIndex + prefix.length)
        if (cookieEndIndex == -1)
                cookieEndIndex = document.cookie.length
        return unescape(document.cookie.substring(cookieStartIndex + prefix.length, cookieEndIndex))
}

function setVisitedItems(item) {
	var datestring=new Date();
	var year=datestring.getFullYear();
	var month=datestring.getMonth();
	var day=datestring.getDate();

	if(month==11){
		month=1;
		year++;
	}else{
		month++;
	}
	datestring=new Date(year,month,day);
	visitedAr=new Array();
	var visitedItems=getCookie('visitedItems');
	exist=false;
	if(visitedItems){
		visitedAr=visitedItems.split(',');
		for(i=0;i<visitedAr.length;i++){
			if(visitedAr[i]==item){
				exist=true;
				break;
			}
		}
		if(exist){
			if(visitedAr.length==50){
				visitedAr.shift();
			}
		}
	}
	if(!exist){
		visitedAr.push(item);
	}
	visitedItems=visitedAr.join(',');
	document.cookie = 'visitedItems='+visitedItems+'; path=/; expires='+datestring.toGMTString();
}