ACC SHELL

window.onload=init;
var sirka,vyska;

function init(){
  sirka=document.getElementById('sirka');
  vyska=document.getElementById('vyska');
  addEvent(sirka,"keyup",count);
  addEvent(vyska,"keyup",count);
}

function addEvent(obj, evType, fn)
  {
  if (obj.addEventListener)
  	{
  	obj.addEventListener(evType, fn, false); 
  	return true;
  	}
  else if (obj.attachEvent)
  	{
  	var r = obj.attachEvent('on'+evType, fn);
  	return r;
  	}
  else
  	{
  	return false;
  	}
  }


function count(){
 
  var w=sirka.value;
  var h=vyska.value;
                                 //0.004437            //0.0025736                   //0.00583686           //0.00391791
  if (w * h < 500000){var const1=0.00510255;var const2=0.00295964;} else {var const1=0.006712389;var const2=0.0045056;}
  
  var cena1=h * w * const1;
  var cena2=h * w * const2;
  var sum=cena1-cena2;

  document.getElementById('cena1').innerHTML=Math.round(cena1) + " ????";
  document.getElementById('cena2').innerHTML=Math.round(cena2) + " ????";
  document.getElementById('sum').innerHTML=Math.round(sum) + " ????";

}