在js中，如何实现用鼠标拖拽DIV层

在使用用onmousedown与onmouseup函数捕捉鼠标点击，如何判断鼠标是否左击或者松开的状态呢？这两个函数具体该怎么使用呢

解决方案 »

  1.   

    //基本思路是这样
    div.onmousedown = 开始绑定事件 {
         document.onmousemove = 你移动div的函数;
        document.onmouseup = 解除事件绑定;
    }
      

  2.   

    如下例子：
    <%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
    <%@ page import="java.util.*"%>                
    <jsp:useBean   id="nongzi" scope="request"  class="beartool.Sys_CompanyFunction"/>
    <%@ include file="../../System/ConstDefine.jsp"%>
    <%@ include file="../../System/FunDefine.jsp"%>
    <%@ include file="../../System/VarDefineList.jsp"%>
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
    <title>无标题文档</title>
    <link rel="stylesheet" href="../Common/Main.css">
    <script language="javascript" SRC="../Common/FunDefine.js"></script>
    <link rel="stylesheet" href="../Common/Extra.css">
    <script language='javascript' src='../Common/graspcrmcore.js'></script>
    <LINK href="..//Common/style.css" rel=stylesheet>
    <SCRIPT language=javascript src="..//Common/calendar.js"></SCRIPT>
    <style type="text/css">
    <!--
    body {
    margin-left: 0px;
    margin-top: 0px;
    margin-right: 0px;
    margin-bottom: 0px;
    }
    -->
    </style>
    <style type="text/css">
    #Main {
    position:absolute;
    bottom:0px;
    left:0px;
    width:100%;
    height:100%;
    overflow:auto;
    z-index:1;
    }
    #ToolBar {
    position:absolute;
    bottom:0px;
    right:0px;
    left:0px;
    width:100%;
    height:23px;
    text-align:center;
    z-index:2;
    overflow:hidden;
    }.STYLE1 {color: #000099}
    </style>
    <style type='text/css'>
    <!--
    body{font-size:12px;}
    a:visited{text-decoration:none;color:slategray;}
    a:hover{text-decoration:underline;color:slategray;}
    a:link{text-decoration:none;color:slategray;}
    -->
    </style>
    <script language=JScript>
    <!--
    //可以打包为js文件;
    var x0=0,y0=0,x1=0,y1=0;
    var offx=6,offy=6;
    var moveable=false;
    var hover='#336699',normal='#336699';//color;
    var index=10000;//z-index;
    //开始拖动;
    function startDrag(obj)
    {
    if(event.button==1)
    {
    //锁定标题栏;
    obj.setCapture();
    //定义对象;
    var win = obj.parentNode;
    var sha = win.nextSibling;
    //记录鼠标和层位置;
    x0 = event.clientX;
    y0 = event.clientY;
    x1 = parseInt(win.style.left);
    y1 = parseInt(win.style.top);
    //记录颜色;
    normal = obj.style.backgroundColor;
    //改变风格;
    obj.style.backgroundColor = hover;
    win.style.borderColor = hover;
    obj.nextSibling.style.color = hover;
    sha.style.left = x1 + offx;
    sha.style.top  = y1 + offy;
    moveable = true;
    }
    }
    //拖动;
    function drag(obj)
    {
    if(moveable)
    {
    var win = obj.parentNode;
    var sha = win.nextSibling;
    win.style.left = x1 + event.clientX - x0;
    win.style.top  = y1 + event.clientY - y0;
    sha.style.left = parseInt(win.style.left) + offx;
    sha.style.top  = parseInt(win.style.top) + offy;
    }
    }
    //停止拖动;
    function stopDrag(obj)
    {
    if(moveable)
    {
    var win = obj.parentNode;
    var sha = win.nextSibling;
    var msg = obj.nextSibling;
    win.style.borderColor     = normal;
    obj.style.backgroundColor = normal;
    msg.style.color           = normal;
    sha.style.left = obj.parentNode.style.left;
    sha.style.top  = obj.parentNode.style.top;
    obj.releaseCapture();
    moveable = false;
    }
    }
    //获得焦点;
    function getFocus(obj)
    {
    if(obj.style.zIndex!=index)
    {
    index = index + 2;
    var idx = index;
    obj.style.zIndex=idx;
    obj.nextSibling.style.zIndex=idx-1;
    }
    }
    //最小化;
    function min(obj)
    {
    var win = obj.parentNode.parentNode;
    var sha = win.nextSibling;
    var tit = obj.parentNode;
    var msg = tit.nextSibling;
    var flg = msg.style.display=="none";
    if(flg)
    {
    win.style.height  = parseInt(msg.style.height) + parseInt(tit.style.height) + 2*2;
    sha.style.height  = win.style.height;
    msg.style.display = "block";
    obj.innerHTML = "0";
    }
    else
    {
    win.style.height  = parseInt(tit.style.height) + 2*2;
    sha.style.height  = win.style.height;
    obj.innerHTML = "2";
    msg.style.display = "none";
    }
    }
    //创建一个对象;
    function xWin(id,w,h,l,t,tit,msg)
    {
    index = index+2;
    this.id      = id;
    this.width   = w;
    this.height  = h;
    this.left    = l;
    this.top     = t;
    this.zIndex  = index;
    this.title   = tit;
    this.message = msg;
    this.obj     = null;
    this.bulid   = bulid;
    this.bulid();
    }
    //初始化;
    function bulid()
    {
    var str = ""
    + "<div id=xMsg" + this.id + " "
    + "style='"
    + "z-index:" + this.zIndex + ";"
    + "width:" + this.width + ";"
    + "height:" + this.height + ";"
    + "left:" + this.left + ";"
    + "top:" + this.top + ";"
    + "background-color:" + normal + ";"
    + "color:" + normal + ";"
    + "font-size:8pt;"
    + "font-family:Tahoma;"
    + "position:absolute;"
    + "cursor:default;"
    + "border:2px solid " + normal + ";"
    + "' "
    + "onmousedown='getFocus(this)'>"
    + "<div "
    + "style='"
    + "background-color:" + normal + ";"
    + "width:" + (this.width-2*2) + ";"
    + "height:20;"
    + "color:white;"
    + "' "
    + "onmousedown='startDrag(this)' "
    + "onmouseup='stopDrag(this)' "
    + "onmousemove='drag(this)' "
    + "ondblclick='min(this.childNodes[1])'"
    + ">"
    + "<span style='width:" + (this.width-2*12-4) + ";padding-left:3px;'>" + this.title + "</span>"
    + "<span style='width:12;border-width:0px;color:white;font-family:webdings;' onclick='min(this)'>0</span>"
    + "<span style='width:12;border-width:0px;color:white;font-family:webdings;' onclick='ShowHide(\""+this.id+"\",null)'>r</span>"
    + "</div>"
    + "<div style='"
    + "width:100%;"
    + "height:" + (this.height-20-4) + ";"
    + "background-color:white;"
    + "line-height:14px;"
    + "word-break:break-all;"
    + "padding:3px;"
    + "'>" + this.message + "</div>"
    + "</div>"
    + "<div id=xMsg" + this.id + "bg style='"
    + "width:" + this.width + ";"
    + "height:" + this.height + ";"
    + "top:" + this.top + ";"
    + "left:" + this.left + ";"
    + "z-index:" + (this.zIndex-1) + ";"
    + "position:absolute;"
    + "background-color:black;"
    + "filter:alpha(opacity=40);"
    + "'></div>";
    document.body.insertAdjacentHTML("beforeEnd",str);
    }
    //显示隐藏窗口
    function ShowHide(id,dis){
    var bdisplay = (dis==null)?((document.getElementById("xMsg"+id).style.display=="")?"none":""):dis
    document.getElementById("xMsg"+id).style.display = bdisplay;
    document.getElementById("xMsg"+id+"bg").style.display = bdisplay;
    }
    //modify by haiwa @ 2005-7-14 
    //
    //-->
    </script><script language='JScript'>
    <!--
    function initialize()
    {
    var a = new xWin("1",360,300,200,60,"公共通知","无公告");
    var b = new xWin("2",360,300,600,60,"任务督办","无督办任务");

    }
    window.onload = initialize;
    //-->
    </script></head><body <%=BODY%>>
     
    <TABLE width="100%" border="0" cellspacing="0" cellpadding="0" align="center">
                        <tr >
                        <td  height="23" background="../images2/main_images/main_right_image/OK1_04_11.gif"><div align="left"><span class="STYLE1">&nbsp;<font size="3" class="STYLE1">我的办公桌</font><font size="3" class="AlertText"></font></span></div></td>
                       </tr>
    </TABLE>
       <p></p>
        <p></p>
         <p></p>
       
        <table class="bodybar" width="100%"  cellspacing="0" cellpadding="0" border="0">    </table>
       <br>
       <br>
       <br>
       <br>
    <div id="ToolBar">
    <TABLE width="100%" height="23" border="0" cellspacing="0" cellpadding="0" align="center">
                        <tr >
                        <td  height="23" background="../images2/main_images/main_right_image/OK1_04_11.gif">&nbsp;<span class="QueryBarTagText"><font size="3"></font></span></td>
                       </tr>
    </TABLE></div>
    </body>
    </html>
      

  3.   


    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
    <HTML>
    <HEAD>
    <TITLE> New Document </TITLE>
    <META NAME="Generator" CONTENT="EditPlus">
    <META NAME="Author" CONTENT="">
    <META NAME="Keywords" CONTENT="">
    <META NAME="Description" CONTENT="">
    <style>
    body{font-family:Verdana;font-size:11px;color:#333;}
    #win1{[position:absolute;left:100;top:100;width:200px;height:150px;border:1px solid #000;}
    .title{width:100%;background:#000;height:18px;color:#fff;cursor: move;} 
    </style>
    <script language="javascript">
    var move=false; 
    function StartDrag(obj) {
        //设置或获取用户所按的鼠标按钮。
    //设置或获取触发事件的对象。
        if (event.button == 1 && event.srcElement.tagName.toUpperCase() == "DIV") {
            obj.setCapture();
            obj.style.background="#999";
            move=true;
        } 
    }function Drag(obj) {
        if(move) {
          var oldwin=obj.parentNode;
          oldwin.style.left=event.clientX-100;
          oldwin.style.top=event.clientY-10;
        }}function StopDrag(obj) {
         obj.style.background="#000";
         obj.releaseCapture();
         move=false;
    } </script> 
    </HEAD><BODY>
    <div id="win1">
    <div class="title" onMousedown="StartDrag(this)" onMouseup="StopDrag(this)" onMousemove="Drag(this)" >窗口1</div>
    设计家园<br>
    www.dwww.cn .
    </div>
    </BODY>
    </HTML>
      

  4.   

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
     <head>
      <title> new document </title>
      <meta name="generator" content="editplus" />
      <meta name="author" content="" />
      <meta name="keywords" content="" />
      <meta name="description" content="" />
     </head> <body>  <script type="text/javascript">
      <!--
    document.write("<style type='text/css'>.dragAble{position:relative;cursor:move;}</style>");
    var dragAble_ie = document.all;
    var dragAble_nn6 = document.getElementById && !document.all;
    var dragAble_isdrag = false;
    var dragAble_y, dragAble_x;
    var dragAble_oDragObj;
    function dragAble_moveMouse(e) {
    if (dragAble_isdrag) {
    dragAble_oDragObj.style.top = (dragAble_nn6 ? nTY + e.clientY - dragAble_y : nTY + event.clientY - dragAble_y) + "px";
    dragAble_oDragObj.style.left = (dragAble_nn6 ? nTX + e.clientX - dragAble_x : nTX + event.clientX - dragAble_x) + "px";
    return false;
    }
    }
    var dragAble_img_id;
    function dragAble_initDrag(e) {
    var oDragHandle = dragAble_nn6 ? e.target : event.srcElement;
    var topElement = "HTML";
    while (oDragHandle.tagName != topElement && oDragHandle.className != "dragAble") {
    oDragHandle = dragAble_nn6 ? oDragHandle.parentNode : oDragHandle.parentElement;
    }
    if (oDragHandle.className == "dragAble") {
    dragAble_isdrag = true;
    dragAble_oDragObj = oDragHandle;
    dragAble_img_id = dragAble_oDragObj.id;
    nTY = parseInt(dragAble_oDragObj.style.top + 0);
    dragAble_y = dragAble_nn6 ? e.clientY : event.clientY;
    nTX = parseInt(dragAble_oDragObj.style.left + 0);
    dragAble_x = dragAble_nn6 ? e.clientX : event.clientX;
    document.onmousemove = dragAble_moveMouse;
    return false;
    }
    }
    document.onmousedown = dragAble_initDrag;
    document.onmouseup = dragAble_dragimg;
    function dragAble_dragimg(e) {
    dragAble_isdrag = false;
    }
      //-->
      </script>
       <div style="width:30px;height:30px; background-color:red;" class="dragAble"></div>
        <div style="width:30px;height:30px; background-color:green;" class="dragAble"></div>
     <div style="width:30px;height:30px; background-color:blue;" class="dragAble"></div>
     </body>
    </html>