// JavaScript Document
function canviImatge(valor)
{	
	var element;
	
	element = document.getElementById("logo");
	
	if(valor)
		element.src = 'imatges/bombolletes.png';
	else
		element.src = 'imatges/gos.png';
}

function canvi_formulari(valor)
{
	var element1;
	var element2;
	var element3;
	
	element1 = document.getElementById("producte1");
	element2 = document.getElementById("producte2");
	element3 = document.getElementById("producte3");
	
	if(element1 != undefined)
		if(element1.value == 'a')
		{
			element2.disabled = true;
			element3.disabled = true;
		}
		else
		{
			if(valor == '1')
			{
				element2.disabled = false;
				if(element2.value == 'a')
				{
					element3.disabled = true;	
				}
				else
				{
					element3.disabled = false;
					
					if(element3.value != 'a')
						document.formulari.submit();
				}
			}
			else
				element3.disabled = false;
				if(element3.value != 'a')
					document.formulari.submit();
		}
}