//PAGINACAO E TROCA DE FOTOS
function changePhoto(type,pos,id){
	var fotoAtual = parseInt(document.getElementById("photoNUM").innerHTML);
	var max = parseInt(document.getElementById("photoMAX").innerHTML);
	var caminhoMaster = "_imgs/";
	var caminho = "";

	//VERIFICA QUAL FOTOS IRA BUSCAR
	switch(type){
		case "home": caminho = "_home/"; break;
		case "projetos": caminho = "_projetos/"; break;
		case "exposicoes": caminho = "_exposicoes/"; break;
	}
	//TROCA AS IMAGENS
	if(pos == "N"){			//PROXIMA
		if(fotoAtual < max){
			document.getElementById("imgSrc").src = caminhoMaster+caminho+"img"+(fotoAtual+1)+".jpg";
			document.getElementById("photoNUM").innerHTML = fotoAtual+1;
			document.getElementById("legendaTitulo").innerHTML = legendaTitulo[fotoAtual+1];
			document.getElementById("legendaTexto").innerHTML = legendaTexto[fotoAtual+1];
		}
	}else if(pos == "B"){	//ANTERIOR
		if(fotoAtual > 1){
			document.getElementById("imgSrc").src = caminhoMaster+caminho+"img"+(fotoAtual-1)+".jpg";
			document.getElementById("photoNUM").innerHTML = fotoAtual-1;
			document.getElementById("legendaTitulo").innerHTML = legendaTitulo[fotoAtual-1];
			document.getElementById("legendaTexto").innerHTML = legendaTexto[fotoAtual-1];
		}
	}else if(pos == "U"){
		document.getElementById("imgSrc").src = caminhoMaster+caminho+"img"+id+".jpg";
		document.getElementById("photoNUM").innerHTML = id;
		document.getElementById("legendaTitulo").innerHTML = legendaTitulo[id];
		document.getElementById("legendaTexto").innerHTML = legendaTexto[id];
	}

	//VERIFICA BOTOES DE PROXIMO/ ANTERIOR
	if(document.getElementById("photoNUM").innerHTML == max){
		document.getElementById("navProjetosAnterior").style.visibility = "visible";
		document.getElementById("navProjetosProximo").style.visibility = "hidden";
	}else if(document.getElementById("photoNUM").innerHTML == 1){
		document.getElementById("navProjetosAnterior").style.visibility = "hidden";	
		document.getElementById("navProjetosProximo").style.visibility = "visible";
	}else{
		document.getElementById("navProjetosAnterior").style.visibility = "visible";
		document.getElementById("navProjetosProximo").style.visibility = "visible";
	}

	//OPACIDADE THUMB
	for(var i=1; i<=max; i++){
		if(document.getElementById("photoNUM").innerHTML == i){
			if(navigator.appName == "Netscape") document.getElementById(i).style.opacity = "1";
			else document.getElementById(i).style.filter = "progid:DXImageTransform.Microsoft.Alpha(opacity=100)";
		}
		else{
			if(navigator.appName == "Netscape") document.getElementById(i).style.opacity = "0.5";
			else document.getElementById(i).style.filter = "progid:DXImageTransform.Microsoft.Alpha(opacity=50)";
		}
	}
}