var tForm = "";
//---------------------------------------------------------------------------------------------------------------------------------------------------------
// Megnyit szerkesztésre egy elemet (AJAX)
//---------------------------------------------------------------------------------------------------------------------------------------------------------
function UsernameAvaible(oForm) {
	tForm = oForm;
	
	var id = oForm.elements['id'] ? oForm.elements['id'].value : 0;
	
	var Parameters = { "do" : "username_avaible",
										"username" : oForm.elements['username'].value,
										"id" : id
									};

	var UsernameAvaible = new Ajax.Request("ajax.php", { method: "post", parameters: $H(Parameters).toQueryString(), onComplete: ParseUsernameAvaible });
}

//---------------------------------------------------------------------------------------------------------------------------------------------------------
// Feldolgozza az AJAX választ
//---------------------------------------------------------------------------------------------------------------------------------------------------------
function ParseUsernameAvaible(response) {
	var response_text = response.responseText;
	
	if(response_text == "error") {
		tForm.elements["username"].setAttribute("avaible", "no");
	} else {
		tForm.elements["username"].setAttribute("avaible", "yes");
	}

	CheckForm(tForm);
}