function which_week(some_date){//returns which week -1=future weeks, 0 =this week, 1=last week, 2=over A week ago

     var sel_date = new Date(some_date);                //converts input date to propper fomrat
     var today=new Date();                              //gets today's date
 
     
    var difference=date_diff_indays(sel_date,today);    //call function 
    var week_num=get_week(difference);                  //call function
        
    return week_num;   
        
 }
 function date_diff_indays (d1, d2) {           //takes 2 dates and subtracts first date from 2nd date.
var diff = Date.parse(d2) - Date.parse(d1);
return Math.floor(diff / 86400000);             //converts from miliseconds back to days
}
 


function get_week(passed){//returns which week -1=future weeks, 0 =this week, 1=last week, 2=over A week ago
                          // input needs to be a number of days from today +=passed -=future.
    var today2=new Date();
        var day_of_week;
        if(today2.getDay()==0){day_of_week=7;}else{day_of_week=today2.getDay();};
    
    var date_diff=passed-day_of_week;//ie..wed =3 if day is more than 3 it is last week
    
    
    if (date_diff<-7){
        return -1;
        }else if(date_diff<0){
                return 0;
            }else if (date_diff<7){
                    return 1;
                }else{
                    return 2;
                    }
    }