var cDecSep = ','
var iDecSepKeycode = cDecSep.charCodeAt(0); //',';

function keyIsNumVal(elmt, evt, blockenter)
{
  var keycode;

  blockenter = (blockenter==true);
  keycode = window.event.keyCode;
  if (keycode == undefined)
  {
    if(evt) 
	  keycode = evt.which;
  }
  if ((keycode == 13) && (blockenter))
  {
	return false;
  }
  if ((keycode > 13) && (keycode != iDecSepKeycode) && ((keycode < 48) || (keycode > 57)))  //44 = , 46 = .
  {
    return false;
  } 
  else
  {
    if ((keycode == iDecSepKeycode) && (elmt.value.indexOf(cDecSep) > -1))
    {
      return false;
    }
    else
    {
      return true;
    }
  }
}

function val_score(field)
{
  if (field.value!='')
  {
    if((field.value > 10)||(field.value < 1))
    {
      alert('De score moet een getal zijn tussen 1 en 10!');
	  field.focus();
	  field.select();
    }
  }
}