function checkMail(mail){
    var er = new RegExp(/^[A-Za-z0-9_\-\.]+@[A-Za-z0-9_\-\.]{2,}\.[A-Za-z0-9]{2,}(\.[A-Za-z0-9])?/);
    if(typeof(mail) == "string"){
        if(er.test(mail)){ return true; }
    }else if(typeof(mail) == "object"){
        if(er.test(mail.value)){
                    return true;
                }
    }else{
        return false;
        }
}
function validaCPF(cpf){
    var i;
    var soma = soma2 = 0;
    if (!(cpf.match(/^[0-9]{3,3}[.]{0,1}[0-9]{3,3}[.]{0,1}[0-9]{3,3}[-]{0,1}[0-9]{2,2}$/))) {
        return false;
    }

    for(i=0;i<10;i++) {
        if (i<9) {
            soma += cpf.charAt(i) * (10 - i);
        }
        soma2 += cpf.charAt(i) * (11 - i);
    }
    if(((soma % 11) < 2 ? 0 : 11 - (soma  % 11 )) != cpf.charAt(9)) {
        return false;
    }
    return (((soma2 % 11 ) < 2 ? 0 : 11 - (soma2 % 11 )) != cpf.charAt(10)) ? false : true;
}

function validaData(campo) {
    var expReg = /^(([0-2]\d|[3][0-1])\/([0]\d|[1][0-2])\/[1-2][0-9]\d{2})$/;
    if ((campo.match(expReg)) && (campo !='')) {
        return true;
    } else {
        return false;
    }
}

function validaNumero(x){
    if(!isNaN(x) && (x.constructor != Boolean) && (x.constructor != Array)){return true;}
    else{return false;}
}

function retiraCaracter(string, caracter) {
    var i = 0;
    var final = '';
    while (i < string.length) {
        if (string.charAt(i) == caracter) {
            final += string.substr(0, i);
            string = string.substr(i+1, string.length - (i+1));
            i = 0;
        }
        else {
            i++;
        }
    }
    return final + string;
}