function cache(str,dest){
    var xml = new ActiveXObject("Microsoft.XMLHTTP")
    xml.open("get","http://localhost/web/project/load_learning.asp?action=loadchapter&BookID=" + str,false)
    xml.send()
    if(xml.readyState == 4){
        var str2 = xml.responsetext
        if(str2){
            var arr = str2.split("||")
            for(var i=0;i<=arr.length;i++){
                arr[i] = arr[i].split(",")
            }
            change(arr,dest)
        }
    }
    delete xml;
}