function del_confirm(question)
{
  var del=confirm(question);
  if (del)
    return true;
  else
    return false;
}

function isArray(obj) {
   if (obj.constructor.toString().indexOf("Array") == -1)
      return false;
   else
      return true;
}



function delivery(obj){

	 if( obj.value != '' )
	  	var aCourier = obj.value.split( "|" );
	 else
    	var aCourier = Array( '0.00', '0.00' );

	var fDeliveryCost = Math.abs( aCourier[1] );

	document.getElementById("delivery_price").innerHTML = fDeliveryCost + ",- Kč";
	document.getElementById("total_price").innerHTML = (+document.getElementById("price").innerHTML + fDeliveryCost) + ",- Kč";
} // end function ordersCouriers