function check_form(){

	var mForm = xGetElementById('mForm');

	if(!mForm.c_content.value.trim()){
		alert('请输入内容！');
		mForm.c_content.focus();
		return false;
	}



	mForm.action	=	'comment_process.php';
	mForm.target	=	'inframe';
	return true;

}