function submit_page_c(form) {
        var foundError = false;
        if(isFieldBlank_c(form.nombre)) {
	        alert("Por favor:\nIngrese su nombre");
			form.nombre.focus();
            foundError = true;
        }else
        if(isFieldBlank_c(form.email_c)) {
	        alert("Por favor:\nIngrese su email");
			form.email.focus();
            foundError = true;
        }else
        if(!foundError && !isValidEmail_c(form.email_c)) {
            alert("La direccion EMAIL no es valida");
			form.email.focus();
            foundError = true;
        }/*else
        if(isFieldBlank_c(form.asunto)) {
	        alert("Por favor:\nIngrese el asunto");
			form.asunto.focus();
            foundError = true;
        }else
        if(isFieldBlank_c(form.mensaje)) {
	        alert("Por favor:\nIngrese su mensaje");
			form.mensaje.focus();
            foundError = true;
        }
*/		
        if(!foundError) {
          form.submit();
        }
    }

    function isFieldBlank_c(theField) {
        if(theField.value.length == 0)
            return true;
        else
            return false;
    }
    function isValidEmail_c(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_c()
{
var Valido  = true

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