javascript之DIV拖动类支持在FF下拖动,调用简单_javascript技巧

调用方法
onmousedown="MyMove.Move('InfoKuang',event,1)"
想问的问题是:如何当我拖到一个指定的地方时层自动吸到指定地方.
相当于拖拽布局

<!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=utf-8" /> <title>Div Move Temp</title> <style> #InfoKuang {     position:absolute;     width:130px;     height:85px;     z-index:1;     filter:alpha(Opacity=60,style=0);     opacity:0.6;     padding: 3px;     border: 1px dashed #000000;     z-index:5000;     bottom:31px;                 font-size:9pt;                            } #InfoKuang ul {     margin: 1px;     padding: 0px;     border-top-width: 1px;     border-right-width: 1px;     border-bottom-width: 1px;     border-left-width: 1px;     border-top-style: none;     border-right-style: none;     border-bottom-style: solid;     border-left-style: none;     border-top-color: #000000;     border-right-color: #000000;     border-bottom-color: #000000;     border-left-color: #000000;     color: #000000;     background-color:#0faead; } #InfoKuang li {     height:24px;     padding: 1px;     line-height: 24px; } </style> </head> <body> <div id="InfoKuang" onmousedown="MyMove.Move('InfoKuang',event,1)"> <span style="cursor:move;">点我调用 拖动窗口</span>     <ul>         <li>                  </li>     </ul>     <ul>         <li>         显示窗口         </li>     </ul>     <ul>         <li>         最大化窗口         </li>     </ul> </div> </body> <script language="javascript"  type="text/javascript"> //通用 移动 Div 类 //请保留一下我的信息,谢谢 //Edit By Skybot //QQ:35287352 function Tong_MoveDiv() {     //参数说明     // id 要移动的层ID      // Evt 是 event, window.event; 要在FF 中可以用    e ? e :window.event;     // T 为 int 有数字是拖动 没有是变大小     this.Move=function(Id,Evt,T)     {         if(Id=="") return;         var o = document.getElementById(Id);         if(!o) return;//如果这个东东不在         evt = Evt ? Evt : window.event;         o.style.position = "absolute";//设定他的样式为绝对定位         o.style.zIndex = 200;//这里显示上下的         var obj = evt.srcElement ? evt.srcElement : evt.target; //得到个原素  使它在FF中也可以用         //得到当前对要移动对象的 坐标         var w = o.offsetWidth;         var h = o.offsetHeight;         var l = o.offsetLeft;         var t = o.offsetTop;         var div = document.createElement("DIV");//新原素DIV         document.body.appendChild(div);         div.style.cssText = "filter:alpha(Opacity=10,style=0);opacity:0.2;width:"+w+"px;height:"+h+"px;top:"+t+"px;left:"+l+"px;position:absolute;background:#000";//设定 filter； 注意opacity 是FF中的 Opacity         div.setAttribute("id", Id +"temp");                  if(T)//看看是拖动还是 变大小         {             this.Move_OnlyMove(Id,evt);         }         else         {                      }     }          //移动函数     //参数 Id  要移动的层ID      //Evt 是 event, window.event; 要在FF 中可以用    e ? e :window.event;     this.Move_OnlyMove = function(Id,Evt)     {         var o = document.getElementById(Id+"temp");         if(!o) return;         evt = Evt?Evt:window.event;//都是FF 才要这么写的         var relLeft = evt.clientX - o.offsetLeft;//得到左边的 宽度         var relTop = evt.clientY - o.offsetTop;//得到上边的 宽度         //抓取 事件         if (!window.captureEvents)         {             o.setCapture(); //指定  抓取 事件                  }         else         {             window.captureEvents(Event.MOUSEMOVE|Event.MOUSEUP);         }                  //文档的 onmousemove 事件         document.onmousemove = function(e)         {             if (!o) return;             e = e ? e : window.event;             if (e.clientX - relLeft <= 0)                 o.style.left = 0 +"px";             else if (e.clientX - relLeft >= document.documentElement.clientWidth - o.offsetWidth - 2)                 o.style.left = (document.documentElement.clientWidth - o.offsetWidth - 2) +"px";             else                 o.style.left = e.clientX - relLeft +"px";             if (e.clientY - relTop <= 1)                 o.style.top = 1 +"px";             else if (e.clientY - relTop >= document.documentElement.clientHeight - o.offsetHeight - 30)                 o.style.top = (document.documentElement.clientHeight - o.offsetHeight - 30) +"px";             else                 o.style.top = e.clientY - relTop +"px";         }                  //文档的 onmouseup 事件         document.onmouseup = function()         {             if (!o) return;             if (!window.captureEvents)                 o.releaseCapture();             else                 window.releaseEvents(Event.MOUSEMOVE|Event.MOUSEUP);             var o1 = document.getElementById(Id);             if (!o1) return;             var l0 = o.offsetLeft;             var t0 = o.offsetTop;             var l = o1.offsetLeft;             var t = o1.offsetTop;                 MyMove.Move_e(Id, l0 , t0, l, t);             document.body.removeChild(o);             o = null;         }         }          this.Move_e = function(Id, l0 , t0, l, t)     {         if (typeof(window["ct"+ Id]) != "undefined") clearTimeout(window["ct"+ Id]);         var o = document.getElementById(Id);         if (!o) return;         var sl = st = 8;         var s_l = Math.abs(l0 - l);         var s_t = Math.abs(t0 - t);         if (s_l - s_t > 0)             if (s_t)                 sl = Math.round(s_l / s_t) > 8 ? 8 : Math.round(s_l / s_t) * 6;             else                 sl = 0;         else             if (s_l)                 st = Math.round(s_t / s_l) > 8 ? 8 : Math.round(s_t / s_l) * 6;             else                 st = 0;         if (l0 - l < 0) sl *= -1;         if (t0 - t < 0) st *= -1;         if (Math.abs(l + sl - l0) < 52 && sl) sl = sl > 0 ? 2 : -2;         if (Math.abs(t + st - t0) < 52 && st) st = st > 0 ? 2 : -2;         if (Math.abs(l + sl - l0) < 16 && sl) sl = sl > 0 ? 1 : -1;         if (Math.abs(t + st - t0) < 16 && st) st = st > 0 ? 1 : -1;         if (s_l == 0 && s_t == 0) return;         if (Math.abs(l + sl - l0) < 2)             o.style.left = l0 +"px";         else             o.style.left = l + sl +"px";         if (Math.abs(t + st - t0) < 2)              o.style.top = t0 +"px";         else             o.style.top = t + st +"px";         window["ct"+ Id] = window.setTimeout("MyMove.Move_e('"+ Id +"', "+ l0 +" , "+ t0 +", "+ (l + sl) +", "+ (t + st) +")", 1);     }           } var MyMove = new  Tong_MoveDiv(); </script> </html>

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javascript之DIV拖动类 支持在FF下拖动,调用简单_javascript技巧_

javascript之DIV拖动类支持在FF下拖动,调用简单_javascript技巧_