function trim(str) {
    if (str != null){
        while (str.charAt(str.length -1) == " ")
            str = str.substring(0, str.length -1);
        while (str.charAt(0) == " ")
            str = str.substring(1, str.length);
    }	
    return str;
}

function isEmpty(str) {
    if (str == null) {
        return true;
    } else if (str.length <= 0) {
        return true;
    }
    return false;
}

function isPositiveInteger(str){
    var pattern = "0123456789";
    var i = 0;
    var pos = 0;
    do {
        pos = 0;
        for (j = 0; j < pattern.length; j++){
            if (str.charAt(i) == pattern.charAt(j)) {
                pos = 1;
                break;
            }
        }
        i++;
    } while (pos==1 && i < str.length)
    return pos == 1;
}

/*
 * Validacao de datas
 * @param campo do formulario
 */
function validDate(formField){
    var result = true;
    if (formField) {
        var elems = formField.value.split("/");
        result = (elems.length == 3); // should be three components
        if (result)	{
            var day = elems[0];
            var month = elems[1];
            var year = elems[2];
            result = ! isNaN(elems[0]) && (month > 0) && (month < 13) &&
            ! isNaN(elems[1]) && (day > 0) && (day < 32) &&
            ! isNaN(elems[2]) && ((elems[2].length == 2) || (elems[2].length == 4));
        }
        if (!result){
            alert('Entre uma data valida!');
            formField.focus();		
            formField.select();
        }
    } else result = false;
    return result;
}

/*
 * Validacao de email
 */
function validEmail(email){
    var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
    if (filter.test(email)) {
        return true;
    }
    return false;
}

/* 
 * Formata??o para qualquer mascara
 * Exemplos:
 * CEP - onKeyUP="formatar(this, '#####-###')"
 * CPF - onKeyUP="formatar(this, '###.###.###-##')"
 * DATA - onKeyUP="formatar(this, '##/##/####')"
 */
function formatar(src, mask) 
{
    if (src != null && src.value != null) {
        var i = src.value.length;
        var saida = mask.substring(0,1);
        var texto = mask.substring(i);
        if (texto.substring(0,1) != saida) {
            src.value += texto.substring(0,1);
        }
    }
}

function formatFone(src){
    if ((src) && (src.vaue != '')) {
        var s = new String(trimtodigits(src.value));
        src.value = s.substring(0, s.length -4)+'-'+s.substring(s.length -4, s.length);
    }
    return;
}

/* 
 * FormataValor(object, tammax, decimals)
 * Formata numero
 */
function FormataValor(objeto,tammax,decimais) {
    var vr = objeto.value;
    if (vr == "") {
        return;
    }
    var idx = -1;
    // procura o "." ou "," de separacao das casas decimais
    for (i = vr.length; i >= 0; i--){
        if (vr.charAt(i) == "." || vr.charAt(i) == ",") {
            idx = vr.length - i - 1;
            break;
        }
    }
    vr = trimtodigits(vr);
    if (idx != -1) {
        // faz o arredondamento
        var currCD = idx;
        vr = vr / Math.pow(10, currCD);
        vr = (Math.round(vr * Math.pow(10, decimais)) / Math.pow(10, decimais))+"";
        idx = -1;
        for (i = vr.length; i >= 0; i--){
            if (vr.charAt(i) == ".") {
                idx = vr.length - i -1;
                break;
            }
        }
    }
    var vi = "";
    var vd = "";
    if (idx == -1) {
        idx = vr.length;
        vi = vr;
    } else {
        vi = vr.substring(0, vr.length - idx -1)  
        vd = vr.substring(vr.length - idx, vr.length);
    }
    // adiciona o ponto a cada 3 casas
    var viaux = vi;
    vi = "";
    var vialen = viaux.length;
    while ((viaux.length - (viaux.length - vialen)) > 3) {
        vi = "."+viaux.substring(vialen - 3, vialen) + vi;
        vialen = vialen - 3;
    }
    vi = viaux.substring(0, vialen) + vi;
    // adiciona zeros para a formatacao
    var currCD = vd.length;
    while (decimais > currCD) {
        vd += "0";
        currCD++;
    }
    // formata
    objeto.value = vi+ "," +vd;
}

/* 
 * by Spot - verifica o CNPJ
 */
function verificaCNPJ(scgc) {  
    var cgc = trimtodigits(scgc);  
    if ((cgc.indexOf("-") != -1) || (cgc.indexOf(".") != -1) || (cgc.indexOf("/") != -1)){  
        return( false )  
    }  
    var df, resto, dac = ""  
    df = 5*cgc.charAt(0)+4*cgc.charAt(1)+3*cgc.charAt(2)+2*cgc.charAt(3)+9*cgc.charAt(4)+8*cgc.charAt(5)+7*cgc.charAt(6)+6*cgc.charAt(7)+5*cgc.charAt(8)+4*cgc.charAt(9)+3*cgc.charAt(10)+2*cgc.charAt(11)  
    resto = df % 11  
    dac += ( (resto <= 1) ? 0 : (11-resto) )  
    df = 6*cgc.charAt(0)+5*cgc.charAt(1)+4*cgc.charAt(2)+3*cgc.charAt(3)+2*cgc.charAt(4)+9*cgc.charAt(5)+8*cgc.charAt(6)+7*cgc.charAt(7)+6*cgc.charAt(8)+5*cgc.charAt(9)+4*cgc.charAt(10)+3*cgc.charAt(11)+2*parseInt(dac)  
    resto = df % 11  
    dac += ( (resto <= 1) ? 0 : (11-resto) )  
    return !(dac == cgc.substring(cgc.length-2,cgc.length))  
}  

/* 
 * Remove todos os caracteres excetos 0-9
 */
function trimtodigits(tstring){  
    s="";  
    ts=new String(tstring);  
    for (x=0;x<ts.length;x++){  
        ch=ts.charAt(x);  
        if (asc(ch)>=48 && asc(ch)<=57){  
            s=s+ch;  
        }  
    }  
    return s;  
}  

/* 
 * Retorna o c?digo ASC do caracter passada por par?metro
 */
function asc(achar) {
    var n=0;
    var ascstr = makeCharsetString();
    for(i=0;i<ascstr.length;i++) {
        if(achar==ascstr.substring(i,i+1)) {
            n=i;
            break;
        }
    }
    return n+32
}

/* 
 * Gera uma string com os caracteres b?sicos na sequ?ncia de c?digos ASC
 */
function makeCharsetString(){  
    var astr
    astr = ' !"#$%&\'()*+,-./0123456789:;<=>?@';
    astr+= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz';
    astr+= '{|}~';
    return astr;
}  

/* 
 * verifica o cpf
 */
function verificaCPF(cpf){
    var num_cpf = trimtodigits(cpf);
    if (num_cpf == null){ 
        return false;
    }
    if (num_cpf.length != 11){
        return false;
    }
    num_cpf_dv = num_cpf.substring(9,11);
    num_cpf = num_cpf.substring(0,9);
    for (k=1;k<3;k++) {
        soma = 0;
        multi = 1;
        for (i=num_cpf.length-1;i>=0;i--){
            multi++;
            soma += (parseInt(num_cpf.substring(i,i+1),10) * multi); 
        }
        resto = (soma % 11);
        dv =0;
        if (resto > 1){
            dv= 11 - resto;
        }
        num_cpf +=dv; 
    }
    return (num_cpf_dv == num_cpf.substring(9,11));
}