jsは今週の日付を取得します.


function formOnload()
{
//             
 var date = new Date();
 var this_day = date.getDay(); //         
 var step_s = -this_day+1; //          (    )
if (this_day == 0) {
 step_s = -7; //        
  }
var step_m = 7 - this_day; //          (    )
var thisTime = date.getTime();
var monday = new Date(thisTime +  step_s * 24 * 3600* 1000);
var sunday = new Date(thisTime +  step_m * 24 * 3600* 1000);
//         
var starttime = transferDate(monday); //       (    )
var endtime = transferDate(sunday);  //       (    )
document.getElementById("starttime").value = starttime;
document.getElementById("endtime").value = endtime;
}
function transferDate(date) {
 var yearTemp = date.getYear();
 var monthTemp = date.getMonth()+1;
 var dayTemp = date.getDate();
  if(parseInt(monthTemp) < 10) {
  monthTemp = "0" + monthTemp;
 } 
 
 if(parseInt(dayTemp) < 10) {
  dayTemp = "0" + dayTemp;
 }
 return yearTemp + "-" + monthTemp + "-" + dayTemp;
}