function geraBanner() {
	var banner = document.getElementById('BannerTop');
	var conteudo = Math.ceil(22*Math.random());
	if (conteudo < 10) {
		conteudo = '0'+conteudo;
	}
	var imagem = "<object type='application/x-shockwave-flash' data='./images/top"+conteudo+".swf' width='907' height='280'><param name='movie' value='./images/top"+conteudo+".swf' /><param name='wmode' value='transparent' /></object>";
	banner.innerHTML = imagem;
}

function SubscribeOpen() { 
	document.getElementById('subscribe').style.display = "block";
}

function SubscribeClose() { 
	document.getElementById('subscribe').style.display = "none";
}

function clique(campo, valor) {
	if (document.getElementById(campo).value == valor) {
		document.getElementById(campo).value = '';
	}
}

function retorna(campo, valor) {
	if (document.getElementById(campo).value == '') {
		document.getElementById(campo).value = valor;
	}
}

function mascara(objeto, sMask, evtKeyPress) {
    var i, nCount, sValue, fldLen, mskLen,bolMask, sCod, nTecla;

	if(document.all) { // Internet Explorer
		nTecla = evtKeyPress.keyCode;
	} else if(document.layers) { // Nestcape
		nTecla = evtKeyPress.which;
	} else {
		nTecla = evtKeyPress.which;
		if (nTecla == 8 || nTecla == 0) {
			return true;
		}
	}

    sValue = objeto.value;

    // Limpa todos os caracteres de formatação que
    // já estiverem no campo.
    sValue = sValue.toString().replace( "-", "" );
    sValue = sValue.toString().replace( "-", "" );
    sValue = sValue.toString().replace( ".", "" );
    sValue = sValue.toString().replace( ".", "" );
    sValue = sValue.toString().replace( "/", "" );
    sValue = sValue.toString().replace( "/", "" );
    sValue = sValue.toString().replace( ":", "" );
    sValue = sValue.toString().replace( ":", "" );
    sValue = sValue.toString().replace( "(", "" );
    sValue = sValue.toString().replace( "(", "" );
    sValue = sValue.toString().replace( ")", "" );
    sValue = sValue.toString().replace( ")", "" );
    sValue = sValue.toString().replace( " ", "" );
    sValue = sValue.toString().replace( " ", "" );
    fldLen = sValue.length;
    mskLen = sMask.length;

    i = 0;
    nCount = 0;
    sCod = "";
    mskLen = fldLen;

    while (i <= mskLen) {
      bolMask = ((sMask.charAt(i) == "-") || (sMask.charAt(i) == ".") || (sMask.charAt(i) == "/") || (sMask.charAt(i) == ":"))
      bolMask = bolMask || ((sMask.charAt(i) == "(") || (sMask.charAt(i) == ")") || (sMask.charAt(i) == " "))

      if (bolMask) {
        sCod += sMask.charAt(i);
        mskLen++;
	  }else{
        sCod += sValue.charAt(nCount);
        nCount++;
      }
      i++;
    }

    objeto.value = sCod;

	if (nTecla != 8) { // backspace ou tab
		if(sMask.charAt(i-1) == "9"){ // apenas números...
			return ((nTecla > 47) && (nTecla < 58));
		}else{ // qualquer caracter...
			return true;
		} 
	}else{
		return true;
	}
}