var secondsinc = 0;
var minitinc=0;
var timeid=0;

	       var query = window.location.search.substring("?");
		     query = query.replace("?","");
             var vars = query.split("&");
			 if(vars.length==4)
                 {
    				var pair = vars[3].split("=");
                    var rtime=pair[1].split(":");
					minitinc=rtime[0] * 1;
					secondsinc=rtime[1] * 1;
					display();
				 }
				 else
				 {
					 minitinc=0;
					 secondsinc=0;
					 display();
				 }

function display()
{
  if (secondsinc>=60)
     {
       secondsinc=0;
       minitinc+=1;
     }
  else
     {
       secondsinc+=1;
     }

document.orderform.txttime.value =minitinc + ":" + secondsinc;
timeid=setTimeout("display()",1000);
}
  
function stop()
  {
  clearTimeout ( timeid );
  }