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;

 })

 varshowWidth = $("#show").width();

 varshowHeight = $("#show").height();

 vardocumentWidth = $(document).width();

 vardocumentHeight = $(document).height();

 $(document).mousemove(function(e) {

   if(vbool) {

     vardivheight = e.pageY - cHeight;//窗口要移动到的位置

     vardivwidth = 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){

      varx=e.pageX-_x;//移动时根据鼠标位置计算控件左上角的绝对位置

      vary=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

  });

});