function vistaOk() {
		var elementTriat = document.formulariS.service.value;
		var preu;
		switch (elementTriat) {
			case '6':			// Sessiķ de terāpia breu via e-mail gratuīta
			preu = '0';
			document.getElementById('triaHora').style.visibility = "hidden";
			document.getElementById('boto').style.visibility = "visible";
			break;

			case '1':			// Sessiķ de terāpia breu via e-mail
			preu = '10';
			document.getElementById('triaHora').style.visibility = "hidden";
			document.getElementById('boto').style.visibility = "visible";
			break;

			case '2':			// Sessiķ de terāpia via chat
			preu = '20';
			document.getElementById('triaHora').style.visibility = "visible";
			document.getElementById('boto').style.visibility = "visible";
			break;

			case '3':			// Sessiķ de terāpia verbal
			preu = '30';
			document.getElementById('triaHora').style.visibility = "visible";
			document.getElementById('boto').style.visibility = "visible";
			break;

			case '4':			// Pack de Sessions de chat
			preu = '50';
			document.getElementById('triaHora').style.visibility = "visible";
			document.getElementById('boto').style.visibility = "visible";
			break;

			case '5':			// Pack de Sessions de terāpia verbal
			preu = '75';
			document.getElementById('triaHora').style.visibility = "visible";
			document.getElementById('boto').style.visibility = "visible";
			break;

			default :
			preu = '?';
			break;
		}
	    	if(document.getElementById){ 
	        	document.getElementById('preuvisible').innerHTML = preu+'&nbsp;&euro;+<input type="hidden" name="preu" value="'+preu+'">'; 
		} 
	}