摘要：過濾標簽，并轉義特殊字符內容長度為字符之間姓名長度為字符之間堆疊順序值出錯了演示下載地址

演示下載地址：http://www.erdangjiade.com/js...
效果圖：

完整代碼如下：

首先我們引入jQuery庫、拖動插件jqueryui及彈出層插件fancybox：
      
     
    
    然后我們在notes表里面讀取便簽條：
    $query = mysql_query("select * from notes order by id desc limit 0, 50"); 
    while ($row = mysql_fetch_array($query)) { 
        list($left, $top, $zindex) = explode("|", $row["xyz"]); 
        $time = strtotime($row["addtime"]); 
        $notes.= " 
        
 
            " . $row["id"] . "." . htmlspecialchars($row["content"]) . " 
            
——" . htmlspecialchars($row["name"]) . "
(" . tranTime($time) . ")
 
        
"; 
    }
    添加便簽條：
    $("#addbtn").live("click", function(e) { 
            var txt = $("#note_txt").val(); 
            var user = $("#user").val(); 
            var color = $("#mycolor").val(); 
            if (txt == "") { 
                $("#msg").html("內容不能為空"); 
                $("#note_txt").focus(); 
                return false; 
            } 
            if (user == "") { 
                $("#msg").html("請輸入您的姓名！"); 
                $("#user").focus(); 
                return false; 
            } 
            var left = 0; 
                    var top = 0; 
            var data = { 
                "zIndex": ++zIndex, 
                "content": txt, 
                "user": user, 
                "color": color, 
                "left":left, 
                "top":top 
            }; 
            $.post("posts.php", data, function(msg) { 
                zIndex = zIndex++; 
                //alert(zIndex); 
                if (parseInt(msg)) { 
                     
                    var str = "
" + msg + "." + txt + "
——" + user + "(剛剛)
"; 
                    $(".container").append(str); 
                    make_draggable($(".note")); 
                    $.fancybox.close(); 
                } else { 
                    $("#msg").html(msg); 
                } 
            }); 
            e.preventDefault(); 
        });
    刪除便簽條：
    $(".note").find(".close").click(function() { 
            var id = $(this).parents(".note").attr("data-id"); 
            $.get("ajax.php", {id: id}, function(data) { 
                if (data == 1) { 
                    $("#note_"+id).fadeOut(); 
                } 
            }, "json") 
    })
    posts.php
    后臺PHP接收ajax請求后，驗證數據合法性，將數據插入數據表中，成功后返回插入的id值，返回給前臺。
    $left = intval($_POST["left"]); 
    $top = intval($_POST["top"]); 
    $txt = stripslashes(trim($_POST["content"])); 
    $txt = htmlspecialchars($txt, ENT_QUOTES); 
    $txt = mysql_real_escape_string(strip_tags($txt), $link); //過濾HTML標簽，并轉義特殊字符 
    if (strlen($txt) < 1 || strlen($txt) > 100) { 
        echo "內容長度為1~100字符之間"; 
        exit; 
    } 
    $user = stripslashes(trim($_POST["user"])); 
    $user = htmlspecialchars($user, ENT_QUOTES); 
    $user = mysql_real_escape_string(strip_tags($user), $link); 
    if (strlen($user) < 2 || strlen($user) > 30) { 
        echo "姓名長度為2~10字符之間"; 
        exit; 
    } 
     
    $color = $_POST["color"]; 
    $time = date("Y-m-d H:i:s"); 
    $zIndex = $_POST["zIndex"];//堆疊順序值 
    $xyz = "" . $left . "|" . $top . "|" . $zIndex; 
    $query = mysql_query("insert into notes(content,name,color,xyz,addtime)values("$txt","$user","$color","$xyz","$time")"); 
    if ($query) { 
        echo mysql_insert_id($link); 
    } else { 
        echo "出錯了！"; 
    }

演示下載地址：http://www.erdangjiade.com/js...