Call the function, why is the time still motionless?

Code:
< script type= "text/javascript" >

        $(document).ready(function() {
            
            givetime();
        })
        
        var endtimes = new Array(); //
        var myDate;
        var time_end;
        function givetime() {
            var int_day, int_hour, int_minute, int_second;
            endtimes[0] = $("-sharpactivity_time1").val();
            endtimes[1] = $("-sharpactivity_time2").val();
            myDate = new Date().getTime(); //
            window.setTimeout("DownCount()", 1000);
        }

        function DownCount() {
            
            for(var i = 0; i < 2; iPP) {
                var time_distance;
                time_end = new Date(endtimes[i]).getTime();
                time_end = time_endPP;
                time_distance = time_end - myDate; // 
                if(time_distance <= 0) {
                    $("-sharpGroup_time"+i).html(":");
                    
                } else {
                    timechange(time_distance, i);
        
                }
            }
            window.setTimeout("DownCount()", 1000);
        }

        function timechange(time_distance, i) {
            
            int_day = Math.floor(time_distance / 86400000) //
            time_distance -= int_day * 86400000; //
            int_hour = Math.floor(time_distance / 3600000) //
            time_distance -= int_hour * 3600000; //
            int_minute = Math.floor(time_distance / 60000) //
            time_distance -= int_minute * 60000; //
            int_second = Math.floor(time_distance / 1000) //
            // 
            if(int_hour < 10){
                int_hour = "0" + int_hour;
            }
            if(int_minute < 10){
                int_minute = "0" + int_minute;
            }                
            if(int_second < 10){
                int_second = "0" + int_second;
            }                
            $("-sharpGroup_time" + i).html("<em></em>" + int_day + "" + int_hour + "" +int_minute + "" + int_second + "");
        }
    </script>

time is always static, and the implementation effect is dynamic. The problem now is not to move

givetime(); }) var endtimes = new Array(); // function givetime() { endtimes[0] = $("-sharpactivity_time0").val(); endtimes[1] = $("-sharpactivity_time1").val(); window.setTimeout("DownCount()", 1000); } function DownCount() { for(var i = 0; i < 2; iPP) { var time_distance; var time_end = new Date(endtimes[i]).getTime(); var myDate = new Date().getTime(); // time_distance = time_end - myDate; // if(time_distance <= 0) { $("-sharpactivity_time"+i+" a").removeClass("buy_button"); /*alert("-sharpactivity_time"+i+" a");*/ $("-sharpGroup_time"+i).html(":"); } else { timechange(time_distance, i); } } window.setTimeout("DownCount()", 1000); } function timechange(time_distance, i) { var int_day = Math.floor(time_distance / 86400000) // time_distance -= int_day * 86400000; // var int_hour = Math.floor(time_distance / 3600000) // time_distance -= int_hour * 3600000; // var int_minute = Math.floor(time_distance / 60000) // time_distance -= int_minute * 60000; // var int_second = Math.floor(time_distance / 1000) // // if(int_hour < 10){ int_hour = "0" + int_hour; } if(int_minute < 10){ int_minute = "0" + int_minute; } if(int_second < 10){ int_second = "0" + int_second; } $("-sharpGroup_time" + i).html("<em></em>" + int_day + "" + int_hour + "" +int_minute + "" + int_second + ""); }