function p(indice){
    pre = "ctl00$ContentPlaceHolder1$"
     return eval("document.forms[0]."+pre+indice);
    }
    
    function e(elemento){
     return document.getElementById(elemento);
    }
    
    function limpa(el){
      el = e(el);
       if(el.hasChildNodes()){
        while(el.hasChildNodes()){
         el.removeChild(el.childNodes[0]);
        }
       }
    }
    
    function adiciona(el,obj){
     try{
      e(el).insertBefore(obj);
     }catch(ex){
       e(el).insertBefore(obj,e(el).childNodes[0]);
     }
    } 
    
    function validaNewsletter(source,args){           
              
      if(p("tNome").value.length<3){
       alert("O campo 'Nome completo' deve ser preenchido!");
       p("tNome").focus();
       return args.IsValid = false;
      }
      
      if(p("tEmail").value.length<3 || p("tEmail").value.indexOf("@")<1 || p("tEmail").value.indexOf(".")<1){
       alert("O campo 'Email' deve ser preenchido corretamente!");
       p("tEmail").focus();
       return args.IsValid = false;
      }
      
      return args.IsValid = true;
 }