function refreshcaptcha(l_formname){
    //var l_file='refresh_captcha_process.php';
    var l_file="includes/captcha/refresh_captcha_process.php";
	$.post(l_file, $("#" + l_formname).serialize(),
	function(data){
		eval("var f = document." + l_formname);
		var randomnumber=Math.floor(Math.random()*11)
		f.fn_check_code.value = data;
		//alert(data);
		$("#captchaimg").attr('src', 'includes/captcha/captcha_code_file.php?' + randomnumber);
	}, "json");
	return false;
}