jQuery窗口拖动功能的实现代码

 $("#showTitle").mousedown(function (e) {    vbool = true;    vHeight = e.pageY;    vWidth = e.pageX;    cHeight = vHeight - $("#show").offset().top;    cWdith = vWidth - $("#show").offset().left;    //alert("divshow" + $("#show").offset().top + " divvHeight" + vHeight);    //alert("高" + cHeight + " 宽" + cWdith);  })  $(document).mouseup(function () {    vbool = false;  })  var showWidth = $("#show").width();  var showHeight = $("#show").height();  var documentWidth = $(document).width();  var documentHeight = $(document).height();  $(document).mousemove(function (e) {    if (vbool) {      var divheight = e.pageY - cHeight;//窗口要移动到的位置      var divwidth = e.pageX - cWdith;//窗口要移动到的位置      $("#la1").text(divheight + "w" + divwidth + "win" + showWidth + " x " + documentWidth + "" + showWidth);      if (divwidth < 0) {        divwidth = 0;      }      if (divheight < 50) {        divheight = 50;      }      if (divwidth > documentWidth - showWidth) {        divwidth = documentWidth - showWidth - 5;      }      if (divheight > documentHeight - showHeight) {        divheight = documentHeight - showHeight - 5;      }      $("#show").css({ "left": divwidth, "top": divheight });    }  })

// 弹窗模块拖拽拖动$(function(){  var _move=false;//移动标记  var _x,_y;//鼠标离控件左上角的相对位置  var _dragZone = $(".M_boxCenter .M_boxBody > h3");  var _dragBody = _dragZone.parent();  _dragZone.mousedown(function(e){    $(this).attr("onselectstart", "return false"); //禁双击选中    $("body").css({"-webkit-user-select":"none", "-moz-user-select":"none", "-ms-user-select":"none", "-khtml-user-select":"none", "user-select":"none"}); //禁止选中文字    _move=true;    _x=e.pageX-parseInt(_dragBody.css("margin-left"));    _y=e.pageY-parseInt(_dragBody.css("margin-top"));    _dragBody.fadeTo(150, 0.5);  });  $(document).mousemove(function(e){    if(_move){      var x=e.pageX-_x;//移动时根据鼠标位置计算控件左上角的绝对位置      var y=e.pageY-_y;      if(e.pageX <= 0 || e.pageY <= 0){        _move=false;      }else {        _dragBody.css({marginLeft:x, marginTop:y});//控件新位置      }    }  }).mouseup(function(){    _move=false;    _dragBody.fadeTo("fast", 1);    $("body").removeAttr("style"); //移除不能选文字  });});