function removeText(default_text,id)
{
	
	if($("#"+id).attr("value") == default_text)
	{
		$("#"+id).attr("value","");
	}
}

$(document).ready(function(){
	var contact_text = $("#write_us_contact").attr("value");
	var question_text = $("#write_us_question").attr("value");
	$("#write_us_form").submit(function(event){
		if(!$("#write_us_contact").attr("value") || !$("#write_us_question").attr("value") || $("#write_us_contact").attr("value") == contact_text || $("#write_us_question").attr("value") == question_text)
		{
			alert("Nebyl zadán kontakt nebo text zprávy!");
			event.preventDefault();
		}
	});
	$("#message").fadeOut(3000);
  });