How can we convert a date to string (not date string) in javascript?

var d1 = new Date("3/22/2010 6:43:00 PM");
var d=GetStringDate(d1);
document.write("Converted Date:"+d);

function GetStringDate(tDate)
{
   strDate = (tDate.getMonth()+1) + "/" + tDate.getDate() 
             + "/" + tDate.getYear() + " " + getClockTime();
   return strDate;
}
function getClockTime()
{
   var now    = new Date();
   var hour   = now.getHours();
   var minute = now.getMinutes();
   var second = now.getSeconds();
   var ap = "AM";
   if (hour   > 11) { ap = "PM";             }
   if (hour   > 12) { hour = hour - 12;      }
   if (hour   == 0) { hour = 12;             }
   if (hour   < 10) { hour   = "0" + hour;   }
   if (minute < 10) { minute = "0" + minute; }
   if (second < 10) { second = "0" + second; }
   var timeString = hour +
                    ':' +
                    minute +
                    ':' +
                    second +
                    " " +
                    ap;
   return timeString;
}