function limpar(valor, validos)
{ 
	// retira caracteres invalidos da string 
	var result = ""; 
	var aux; 
	for (var i=0; i < valor.length; i++)
	{ 
		aux = validos.indexOf(valor.substring(i, i+1)); 
		if (aux>=0)
			result += aux;
	}
	
	return result; 
} 

function limparCampo(campo, valorPadrao)
{
	if(campo.value == valorPadrao)
		campo.value = "";
}

function voltarPadrao(campo, valorPadrao)
{
	if(campo.value == "")
		campo.value = valorPadrao; 
}

MaskInput = function(f, m){
    function mask(e){
        var patterns = {"1": /[A-Z]/i, "2": /[0-9]/, "4": /[\xC0-\xFF]/i, "8": /./ },
            rules = { "a": 3, "A": 7, "9": 2, "C":5, "c": 1, "*": 8};
        function accept(c, rule){
            for(var i = 1, r = rules[rule] || 0; i <= r; i<<=1)
                if(r & i && patterns[i].test(c))
                    break;
                return i <= r || c == rule;
        }
        var k, mC, r, c = String.fromCharCode(k = e.key), l = f.value.length;
        (!k || k == 8 ? 1 : (r = /^(.)\^(.*)$/.exec(m)) && (r[0] = r[2].indexOf(c) + 1) + 1 ?
            r[1] == "O" ? r[0] : r[1] == "E" ? !r[0] : accept(c, r[1]) || r[0]
            : (l = (f.value += m.substr(l, (r = /[A|9|C|\*]/i.exec(m.substr(l))) ?
            r.index : l)).length) < m.length && accept(c, m.charAt(l))) || e.preventDefault();
    }
    for(var i in !/^(.)\^(.*)$/.test(m) && (f.maxLength = m.length), {keypress: 0, keyup: 1})
        addEvent(f, i, mask);
};

//Formata número tipo moeda usando o evento onKeyDown 
function formataNumeros(campo,tammax,teclapres,decimal)
{ 
	var tecla = teclapres.keyCode; 
	vr = limpar(campo.value,"0123456789"); 
	tam = vr.length; 
	dec = decimal;

	if (tam < tammax && tecla != 8)
		tam = vr.length + 1;

	if (tecla == 8 )
		tam = tam - 1 ;

	if ( tecla == 8 || tecla >= 48 && tecla <= 57 || tecla >= 96 && tecla <= 105 )
	{
		if ( tam <= dec ) 
			campo.value = vr ;

		if ( (tam > dec) && (tam <= 5) )
			campo.value = vr.substr( 0, tam - 2 ) + "," + vr.substr( tam - dec, tam ) ;

		if ( (tam >= 6) && (tam <= 8) )
			campo.value = vr.substr( 0, tam - 5 ) + "." + vr.substr( tam - 5, 3 ) + "," + vr.substr( tam - dec, tam ) ; 

		if ( (tam >= 9) && (tam <= 11) )
			campo.value = vr.substr( 0, tam - 8 ) + "." + vr.substr( tam - 8, 3 ) + "." + vr.substr( tam - 5, 3 ) + "," + vr.substr( tam - dec, tam ) ;

		if ( (tam >= 12) && (tam <= 14) )
			campo.value = vr.substr( 0, tam - 11 ) + "." + vr.substr( tam - 11, 3 ) + "." + vr.substr( tam - 8, 3 ) + "." + vr.substr( tam - 5, 3 ) + "," + vr.substr( tam - dec, tam ) ;

		if ( (tam >= 15) && (tam <= 17) )
			campo.value = vr.substr( 0, tam - 14 ) + "." + vr.substr( tam - 14, 3 ) + "." + vr.substr( tam - 11, 3 ) + "." + vr.substr( tam - 8, 3 ) + "." + vr.substr( tam - 5, 3 ) + "," + vr.substr( tam - 2, tam ) ;
	}
}

function apenasNumericos(caracter,valor)
{

	if(document.all)
	{ // Internet Explorer
		var tecla = event.keyCode;
	}
	else
	{
		
			var tecla = caracter.which;
		
	}
	if (tecla == 46 && valor.indexOf(".") > -1)
	{
		return false;
	}
	if(tecla > 47 && tecla < 58)
	{ // numeros de 0 a 9
		return true;
	}
	else
	{
		if (tecla != 8)
		{ // backspace
			return false;
		}
		else
		{
			return true;
		}
	}
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}