function checkform(){
	var nickname = $("#nickname").attr("value");
	var server   = $("#server").attr("value");
	var comment  = $("#comment").attr("value");
	var fup      = $("#fup").attr("value");
	
	if(nickname == ""){
		alert("昵称不能为空");
		return false;
	
	}else if(server == ""){
		alert("所在服务器不能为空");
		return false;
	
	}else if(comment == ""){
		alert("评论内容不能为空");
		return false;
	
	}else{
		$.ajax({url:'ajax.php',
			   type: 'POST',
			   data:"fup="+fup+"&nickname="+nickname+"&comment="+comment+"&server="+server+"&inajax=pb",
			   dataType: 'html',
			   timeout: 1000,
			   success:function(data){
 				 $("#listshow").html(data);
				 $("#nickname").attr("value","");
				 $("#server").attr("value","");
				 $("#comment").attr("value","");
			  }
		});
		return false;
	}
}

function commentblur(){
	var comment  = $("#comment").attr("value");
	//alert(comment);
	if(comment == "在此输入你的评论......"){
		$("#comment").attr("value","");
	}
}

function commentshow(){
	var comment  = $("#comment").attr("value");
	if(comment  == ""){
		$("#comment").attr("value","在此输入你的评论......");
	}
}

function bookmarkblur(){
	var email  = $("#email").attr("value");
	//alert(comment);
	if(email == "输入电子邮箱地址，免费订阅《大亨》杂志......"){
		$("#email").attr("value","");
	}
}

function bookmarkshow(){
	var email  = $("#email").attr("value");
	if(email  == ""){
		$("#email").attr("value","输入电子邮箱地址，免费订阅《大亨》杂志......");
	}
}

function book_mark(){
	var email  = $("#email").attr("value");
	var pattern =/^([^~\!@#\$%\^&\*\(\)=\|+\\/]{1,25})@([\w\d-\.]{1,50})\.([a-zA-Z0-9]+)$/i;
	if(email  == "" || email == "输入电子邮箱地址，免费订阅《大亨》杂志......"){
		showbg(4);
		return false;
	}else if(!pattern.test(email)){
		showbg(6);
		return false;
	}else{
		$.ajax({url:'ajax.php',
			   type: 'POST',
			   data:"email="+email+"&inajax=book",
			   dataType: 'html',
			   timeout: 1000,
			   success:function(data){
 				  if(data == '1'){
			   	      showbg(3);
 				  }else{
	 				  showbg(5);
 				  }  
 			 	 $("#email").attr("value","");
			  }
		});
		return false;
	}
}