function comprovaForm(){
	falten = 'Falta omplir les dades :\n';
	if(document.contacta.nom.value==''){falten+='\nNom i Cognoms';}
	if(document.contacta.edat.value==''){falten+='\nEdat';}
	if(document.contacta.poblacio.value==''){falten+='\nPoblació';}
	if(document.contacta.mail.value==''){falten+='\nMail';}
	if(document.contacta.suggeriments.value==''){falten+='\nQueixes o suggeriments';}
	if(falten == 'Falta omplir les dades :\n'){
		document.contacta.submit();
	}else{
		alert(falten);
	}
}

function initImage(imageId) {
	capa = document.getElementById(imageId);
	setOpacity(capa, 0);
}
function mostrarimatges(event,imageId,foto){
	var IE = document.all?true:false;
	if (!IE) document.captureEvents(event.MOUSEMOVE)
	capa.style.display= "";
	var posx = 0;
    var posy = 0;
    if(IE)
	{ //para IE
		posx = event.clientX + document.body.scrollLeft;
		posy = event.clientY + document.body.scrollTop;
	}else{ //para netscape
		posx = event.pageX;
		posy = event.pageY;
	}
	document.getElementById('imatge').innerHTML = '<img src="'+foto+'" />';
	capa.style.left=posx+'px';
	capa.style.top=posy+'px';
	fadeIn(imageId,0);
}
function fadeIn(objId,opacity) {
	if (document.getElementById) {
		obj = document.getElementById(objId);
		if (opacity <= 100) {
			setOpacity(obj, opacity);
			opacity += 10;
			window.setTimeout("fadeIn('"+objId+"',"+opacity+")", 100);
		}
	}
}

function treureimatges(imageId){
	capa.style.display= "";
	if(imageId=='thephoto'){
	document.getElementById('mostra').style.display="";
	document.getElementById('treu').style.display="none";
	}
	fadeOut(imageId,100);
}

function fadeOut(objId,opacity) {
	if (document.getElementById) {
		obj = document.getElementById(objId);
		if (opacity >= 0) {
			setOpacity(obj, opacity);
			opacity -= 10;
			window.setTimeout("fadeOut('"+objId+"',"+opacity+")", 100);
		}
		else{
			capa.style.display= "none";
		}
		
	}
}
function setOpacity(obj, opacity) {
	opacity = (opacity == 100)?99.999:opacity;
	// IE/Win
	obj.style.filter = "alpha(opacity:"+opacity+")";
	// Safari<1.2, Konqueror
	obj.style.KHTMLOpacity = opacity/100;
	// Older Mozilla and Firefox
	obj.style.MozOpacity = opacity/100;
	// Safari 1.2, newer Firefox and Mozilla, CSS3
	obj.style.opacity = opacity/100;
}