function validaEmail(valor){
    re=/^[_a-z0-9-]+(.[_a-z0-9-]+)*@[a-z0-9-]+(.[a-z0-9-]+)*(.[a-z]{2,3})$/
        if(!re.exec(valor) || valor == "")    {
            return false;
        }else{
            return true;
        }
   }
   
   function validaForma(){
       var valido = true;
       
       if(document.forms[0].name.value == ""){
           document.forms[0].name.className = "error";
           document.forms[0].name.style.border ="1px solid #C66";
           document.getElementById("nombre_asterisco").style.display="inline";
           document.getElementById("nombre_asterisco").style.color="red";
           valido = false;
       }else{
           document.forms[0].name.className ="";
           document.forms[0].name.style.border ="1px solid #CCC";
       }
       
       if(validaEmail(document.forms[0].email.value) == false){
           valido = false;
           document.forms[0].email.className = "error";
           document.forms[0].email.style.border ="1px solid #C66";
           document.getElementById("correo_asterisco").style.display="inline";
           document.getElementById("correo_asterisco").style.color="red";
       }else{
           document.forms[0].email.className ="";
           document.forms[0].email.style.border ="1px solid #CCC";
       }
       
       if((document.forms[0].confirmMail.value != document.forms[0].email.value) || document.forms[0].confirmMail.value == ""){
           valido = false;
           document.forms[0].confirmMail.className = "error";
           document.forms[0].confirmMail.style.border ="1px solid #C66";
            document.getElementById("confirmacion_asterisco").style.display="inline";
            document.getElementById("confirmacion_asterisco").style.color="red";
       }else{
           document.forms[0].confirmMail.style.className ="";
           document.forms[0].confirmMail.style.border ="1px solid #CCC";
       }
       
        if((document.forms[0].sex[0].checked == false) && (document.forms[0].sex[1].checked == false)){
        document.getElementById("sexo_asterisco").style.display = "inline";
        document.getElementById("sexo_asterisco").style.color = "red";
        valido =false;
        }
        
        if(document.forms[0].day.selectedIndex <= 0 || document.forms[0].month.selectedIndex <= 0 || document.forms[0].year.selectedIndex <= 0){
        document.getElementById("fecha_asterisco").style.display = "inline";
        document.getElementById("fecha_asterisco").style.color = "red";
        valido = false;
        }
       
       return valido;
   }