问Javascript随机数？

EN

Timer=0;
function countdown(auctionid){
    var auctions;
    var divs;

    Timer=Timer+1;

    if((Timer%10=="0")||(Timer=="1")){
        $.get("current.php", {
                id:auctionid
            },
            function(data){
                auctions=data.split("||");
                for(n=0;n<=auctions.length;n++){
                    if(auctions[n] != undefined){
                        divis=auctions[n].split("##");

                        $('#futu'+divis[0]).html(divis[1]);
                    }
                }
            }
        );
    }

    var cauctionid="auctionid";
    var tauctions=auctionid.split("|");
    for(i=0;i<=tauctions.length;i++){
        if(tauctions[i] != undefined){
            var dd=$('#futu'+tauctions[i]).text();
            var cdd=dd-1;
            $('#futu'+tauctions[i]).html(cdd);

            dd=dd*1000;
            dday=Math.floor(dd/(60*60*1000*24)*1)
            dhour=Math.floor(dd/(60*60*1000)*1)
            dmin=Math.floor((dd%(60*60*1000))/(60*1000)*1)
            dsec=Math.floor(((dd%(60*60*1000))%(60*1000))/1000*1)

            if(dday==0&&dhour==0&&dmin==0&&dsec==0){
                $('#Bid'+tauctions[i]).html("SOLD");
            //return
            }
            if(dhour <=9){
                dhour = "0"+dhour;
            }
            if(dmin <=9){
                dmin = "0"+dmin;
            }
            if(dsec <=9){
                dsec = "0"+dsec;
            }

            if(dd>=1000){
                var valll=dhour+":"+dmin+":"+dsec;
            }

            if(dd<1000){
                var valll="00:00:00";
            }

            $('#Bid'+tauctions[i]).html(valll);
        }
    }
    refreshID=setTimeout("countdown('"+auctionid+"')",1000);
}