function validaForm(){

 var flag=true;
 var nome=document.getElementById("nome").value;
 //nome = nome.trim();
 if (nome==""){

 alert('Nome Obrigatorio!');
 document.getElementById("nome").focus();
 flag=false; return false;


 } else if (document.getElementById("cidade").value=="" ){ 

 alert('Cidade Obrigatoria!');
 document.getElementById("cidade").focus();
 flag=false; return false;

 } else if (document.getElementById("email").value=="" ){ 

 alert('Email Obrigatorio!');
 document.getElementById("email").focus();
 flag=false; return false;

 } else if (document.getElementById("select").selected==true){
 alert('Por Favor, selecione um assunto !');
 flag=false;
 document.getElementById("select").focus();return false;
 } else if (document.getElementById("mensagem").value==""){
 alert('Por Favor, preencha a mensagem!');
 flag=false;
 document.getElementById("mensagem").focus();
return false;
 }



if (document.getElementById("email").value!=""){
 if (validaEmail(document.getElementById("form"))==false){
 //alert('Por Favor, preencha seu email corretamente!');
 document.getElementById("email").focus();
 flag=false; return false;
 }
 }


function validaEmail(nform) {
 if (nform.email.value == "") {
 alert("Informe seu e-mail.");
 nform.email.focus();
 nform.email.select();
 return false;
 } else {
 prim = nform.email.value.indexOf("@");
 if(prim < 2 || nform.email.value.indexOf("@",prim + 1) != -1 || nform.email.value.indexOf(".") < 1 || nform.email.value.indexOf(" ") != -1 || nform.email.value.indexOf("zipmeil.com") > 0 || nform.email.value.indexOf("hotmeil.com") > 0 || nform.email.value.indexOf(".@") > 0 || nform.email.value.indexOf("@.") > 0 || nform.email.value.indexOf(".com.br.") > 0 || nform.email.value.indexOf("/") > 0 || nform.email.value.indexOf("[") > 0 || nform.email.value.indexOf("]") > 0 || nform.email.value.indexOf("(") > 0 || nform.email.value.indexOf(")") > 0 || nform.email.value.indexOf("..") > 0) {
 alert("O e-mail informado foi digitado errado.");
 nform.email.focus();
 nform.email.select();
 return false;
}
}}
 

document.getElementById("form").submit();
}



/** function validJustNumber(valorObj) {
 var valor = valorObj.value;
 //var valor = valorObj;
 var valido = "0123456789";

 if (valido.indexOf(valor.substr(valor.length-1, valor.length)) != -1){

 return true;
 }else{

 valorObj.value= valor.substr(0, valor.length-1);
 return false;
 }
 }

 function validaEmail(nform) {
 if (nform.email.value == "") {
 alert("Informe seu e-mail.");
 nform.email.focus();
 nform.email.select();
 return false;
 } else {
 prim = nform.email.value.indexOf("@");
 if(prim < 2 || nform.email.value.indexOf("@",prim + 1) != -1 || nform.email.value.indexOf(".") < 1 || nform.email.value.indexOf(" ") != -1 || nform.email.value.indexOf("zipmeil.com") > 0 || nform.email.value.indexOf("hotmeil.com") > 0 || nform.email.value.indexOf(".@") > 0 || nform.email.value.indexOf("@.") > 0 || nform.email.value.indexOf(".com.br.") > 0 || nform.email.value.indexOf("/") > 0 || nform.email.value.indexOf("[") > 0 || nform.email.value.indexOf("]") > 0 || nform.email.value.indexOf("(") > 0 || nform.email.value.indexOf(")") > 0 || nform.email.value.indexOf("..") > 0) {
 alert("O e-mail informado foi digitado errado.");
 nform.email.focus();
 nform.email.select();
 return false;
 }
 }
 return true;
 }**/