function felicita (idu, flag)
{
	//flag = 1 obre
	//flag = 0 tanca
	var div = document.getElementById ('com_' + idu);

	if (flag)
	{
		div.style.visibility = "visible";
		div.style.height= "240px";
		div.style.border= "2px solid #009900";
	}
	else
	{
		div.style.visibility = "hidden";
		div.style.height= "0px";
		div.style.border= "0px";
	}
}

function IsNumeric(sText)
{
   //No accepta valors negatius ni decimals
	var ValidChars = "0123456789";
   var IsNumber=true;
   for (i = 0; i < sText.length && IsNumber == true; i++) 
   { 
      IsNumber = (ValidChars.indexOf(sText.charAt(i)) >= 0);		
   }
   return IsNumber;
}


function comprovarValor (val,max)
{
	if (!IsNumeric (val) || val > max) return false;
	return true;
}