function submit_page(form) {
        var foundError = false;
        if(isFieldBlank(form.email)) {
	        alert("Por favor:\nIngrese su email");
			form.email.focus();
            foundError = true;
        }else
        if(!foundError && !isValidEmail(form.email)) {
            alert("La direccion EMAIL no es valida");
			form.email.focus();
            foundError = true;
        }	
		
        if(!foundError) {
          form.submit();
        }
    }

    function isFieldBlank(theField) {
        if(theField.value.length == 0)
            return true;
        else
            return false;
    }
    function isValidEmail(theField) {
        var foundSymbol = false;

        for(var i=0; i<theField.value.length; i++) {
            var ch = theField.value.substring(i,i+1)
            if (ch == "@")
                foundSymbol=true;
        }
    
        return foundSymbol;
    }
function ValidaForm()
{
var Valido  = true

  if(!submit_page(document.forms.forma) )
  {
  Valido = false;
  }
  else{
	document.forms['forma'].submit()
	WinOpen() 
	} 
return Valido
}