// JavaScript Document
    function verificarNewsletter()
    {
		
		
        var form = document.getElementById('newsletter');
    	var erro_js = '';
    	var foco = '';
	
        if (form.it_nome.value == '')
        {
			erro_js = 'Digite seu nome.\n';
    		foco = 'it_nome';
    	}
        if (form.it_email.value == ''){
            erro_js = erro_js + 'Digite seu e-mail\n';

            if (foco == '') foco = 'it_email';
        } else {
            if (!verificaEmail(form.it_email.value)){
                erro_js = erro_js + 'Endereço de e-mail inválido\n';
                if (foco == '') foco = 'it_email';
            }
        }
		
	
    	if (erro_js == '')
    	{
			
			var pNome   = form.it_nome.value;
			var pEmail  = form.it_email.value;
			var pId     = form.idNewsletter.value;	
			

            tXHR=XMLHTTPRequest();   
 
		    if (tXHR) 
			{   
                tXHR.open("GET", "../Funcao-newsletter/cadastra_dados.php?it_nome="+pNome+"&it_email="+pEmail+"&idNewsletter="+pId+"&it_acao=cadastrar" , true);       
                tXHR.onreadystatechange=exibeMensagem;   
                tXHR.send(null);   
            }   




			/*
			var target = "newsletter_cadastrar";
    	    var action = "../Funcao-newsletter/cadastra_dados.php";

        	var largura = 350;
        	var altura  = 150;

        	var left = (screen.width - largura) / 2;
        	var top  = (screen.height - altura) / 2;

        	var propriedades = 'height='+altura+',width='+largura+',top='+top+',left='+left+',toolbar=no,copyhistory=no,location=no,status=no,menubar=no,scrollbars=no,resizable=no,maximize=no';
			
            popup = window.open(action, target, propriedades);
			
            form.target = target;
            form.action = action;
            form.submit();
			form.it_nome.value = "";
			form.it_email.value = "";
            if (parseInt(navigator.appVersion) >= 4) { popup.focus(); }
            form.target = "";
			*/

		} else {
    		alert(erro_js);
    		campo = eval('form.' + foco);
    		campo.focus();
    		return;
    	}
    }
	
	
	function fnfocoNome()
	{	var form = document.getElementById('newsletter');
		form.it_nome.value = '';
		form.it_nome.focus();
	}
	
	function fnfocoEmail()
	{	var form = document.getElementById('newsletter');
		form.it_email.value = '';
		form.it_email.focus();
	}


    function XMLHTTPRequest() 
	{   
       if (window.XMLHttpRequest) 
 	   {   
              a=new XMLHttpRequest(); 
	   } //Objeto nativo (FF/Safari/Opera7.6+)   
       else 
	   {   
            try 
			{   
               a=new ActiveXObject("Msxml2.XMLHTTP");  //activeX (IE5.5+/MSXML2+)   
            }     
            catch(e) 
			{   
              try 
			  {   
                 a=new ActiveXObject("Microsoft.XMLHTTP"); //activeX (IE5+/MSXML1)   
              }     
              catch(e) 
			  { 
                 a=false;   
              }   
            }   
          }   
          return a;   
    }   




       function exibeMensagem() 
		{   
            if (!tXHR) 
			{   
              
			   return false;   
            }   
            else 
			{   
                if (tXHR.readyState == 4) 
				{               
                    if (tXHR.status == 200) 
					{	
 
                        document.getElementById('mensagemNews').innerHTML = tXHR.responseText;

                    }   
                    else 
					{   
                        document.getElementById('mensagemNews').innerHTML = 'Erro! "'+ tXHR.statusText +'" (erro '+ tXHR.status +')';   
                    }   
                }       
            }   
        }