function checkEmail(myForm) {
if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(myForm.Email.value))
{
return (true)
}

alert("Dirección de E-mail inválida.")
return (false)
}



function borra() {
return confirm("¿Confirma el borrado del formulario?");
}
function formCheck(formobj){
 //1) Enter name of mandatory fields
 var fieldRequired = Array("Nombre","Rubro", "Email" ,"im");
 //2) Enter field description to appear in the dialog box
 var fieldDescription = Array("Nombre o Razón Social","Rubro de actividad", "E-mail", "Número de verificación");
 //3) Enter dialog message
 var alertMsg = "Por favor, complete los siguientes campos:\n";
 var listo=false;

 var l_Msg = alertMsg.length;

 for (var i = 0; i < fieldRequired.length; i++){
  var obj = formobj.elements[fieldRequired[i]];
  if (obj){
   switch(obj.type){
   case "select-one":
    if (obj.selectedIndex == -1 || obj.options[obj.selectedIndex].text == ""){
     alertMsg += " - " + fieldDescription[i] + "\n";
    }
    break;
   case "select-multiple":
    if (obj.selectedIndex == -1){
     alertMsg += " - " + fieldDescription[i] + "\n";
    }
    break;
   case "text":
   case "textarea":
    if (obj.value == "" || obj.value == null){
     alertMsg += " - " + fieldDescription[i] + "\n";
    }
    break;
   default:
    if (obj.value == "" || obj.value == null){
     alertMsg += " - " + fieldDescription[i] + "\n";
    }
   }
  }
 }

 if (alertMsg.length == l_Msg){
 	if(checkEmail(formulario)){
        valorNum = formulario.im.value
        
     if( valorNum != "7352"){
        alert('Número de verificación incorrecto')
        return false }  
     else   
  	    listo=confirm('¿Confirma el envío del formulario?' );
	  if (listo)
			 return true; 
     else return false 
		}else return false;
 }else{
  alert(alertMsg);
  return false;
 }
}