function getElement(element)

{
result=eval(document.all[element]); return result;
}


var newWindow;

function winpop(car_id) 
{
	if (!newWindow || newWindow.closed) {

			newWindow = window.open("post_trace.php?gps_login="+car_id+"&subaction=open","","status,scrollbars=no,height=600,width=750,left=100")

			if (!newWindow.opener) {
					newWindow.opener = window;

			}

	} else {

			newWindow.location.href="post_trace.php?gps_login="+car_id+"&subaction=open";
			newWindow.focus();

	}
}



function submitFormWithEnter(myfield,e)

{

   var keycode;

   if (window.event)
   {
      keycode = window.event.keyCode;
   }
   else if (e)
   {
      keycode = e.which;
   }
   else
   {
      return true;
   }


   if (keycode == 13)
   {
      myfield.form.submit();
      return false;
   }
   else
   {
      return true;
   }
}

function limitText(limitField, limitCount, limitNum) {
	
	if (getElement(limitField).value.length>limitNum) {
		getElement(limitField).value = getElement(limitField).value.substring(0, limitNum);
	} else {
		getElement(limitCount).value = limitNum - getElement(limitField).value.length;
	}
}