<!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;"/><title>D类</title><style type="text/css">html, body { margin:0;}</style><script type="text/javascript">/Firefox/.test(navigator.userAgent) && function () { window.__defineGetter__('event', function () { //兼容Event对象 var o = arguments.callee; do { if (o.arguments[0] instanceof Event) return o.arguments[0]; } while (o = o.caller); return null; }); window.attachEvent = Document.prototype.attachEvent = Element.prototype.attachEvent = function (type, listener, capture) { //兼容attachEvent方法 return this.addEventListener(new String(type).substr(2), listener, capture || false); }; window.detachEvent = Document.prototype.detachEvent = Element.prototype.detachEvent = function (type, listener, capture) { //兼容detachEvent方法 return this.removeEventListener(new String(type).substr(2), listener, capture || false); };} ();var D = { //拽补助类 lock: false, dom: function () { //document相关属性 return { left: document.documentElement.scrollLeft , top: document.documentElement.scrollTop , width: document.documentElement.clientWidth , height: document.documentElement.clientHeight , body: document.documentElement }; }, mos: function (e) { //获取鼠标绝对位置 var dom = this.dom(); return { 'x': dom.left + e.clientX, 'y': dom.top + e.clientY } }, pos: function (o) { //获取元素绝对位置 var x = 0, y = 0; do { x += o.offsetLeft, y += o.offsetTop; } while (o = o.offsetParent); return { 'x': x, 'y': y }; }, start: function (element, startEventHandler, moveEventHandler, stopEventHandler) { //移动开始 if (this.lock) return; else this.lock = true; //先上锁安全。。。:D var pos = this.pos(element) //元素位置 , mos = this.mos(window.event) //鼠标位置 , eventHandlers = { MF: null, EF: null} //事件记录 , property = { x: mos.x - pos.x, y: mos.y - pos.y} //属性 , _MF = this.move(moveEventHandler, property) //移动过程事件闭包 , _EF = this.stop(element, stopEventHandler, eventHandlers); //移动停止事件闭包 document.attachEvent('onmousemove', _MF); //鼠标移动 document.attachEvent('onmouseup', _EF); //鼠标释放 element.setCapture? (element.setCapture(), element.attachEvent('onlosecapture', _EF)): window.attachEvent('onblur', _EF); //鼠标捕获丢失则释放 eventHandlers.MF = _MF, eventHandlers.EF = _EF; startEventHandler && startEventHandler(property); }, move: function (moveEventHandler, property) { //移动中 var wc = this; return function (e) { var mos = wc.mos(e || window.event), dom = wc.dom(); window.getSelection && window.getSelection().removeAllRanges(); /MSIE/.test(navigator.userAgent) && function () { //IE滚屏 if (mos.x > dom.left + dom.width) dom.body.scrollLeft = mos.x - dom.width; else if (mos.x < dom.left) dom.body.scrollLeft = mos.x; if (mos.y > dom.top + dom.height) dom.body.scrollTop = mos.y - dom.height; else if (mos.y < dom.top) dom.body.scrollTop = mos.y; } (); moveEventHandler && moveEventHandler({ x: mos.x - property.x, y: mos.y - property.y }); }; }, stop: function (element, stopEventHandler, eventHandlers) { //移动结束 var wc = this; return function (e) { document.detachEvent('onmousemove', eventHandlers.MF); document.detachEvent('onmouseup', eventHandlers.EF); element.setCapture ? (element.detachEvent('onlosecapture', eventHandlers.EF), element.releaseCapture()) : window.detachEvent('onblur', eventHandlers.EF); wc.lock = false; //事件都干掉了可以放心解锁了 stopEventHandler && stopEventHandler(); }; }};</script></head><body><div style="position:absolute; width:100px; height:100px; background-color:#000000;"><div style="position:absolute; width:20px; height:20px; line-height:20px; left:50%; top:50%; margin:-10px 0 0 -10px; background-color:#F00; text-align:center; cursor:move;" onmousedown="var wc = this,pos;D.start(wc, null, function (property) { var node = wc.parentNode; pos = property; var a = D.pos(node), b = D.pos(wc); node.style.left = pos.x = property.x - b.x + a.x + 'px'; node.style.top = pos.y = property.y - b.y + a.y + 'px'; }, function () { alert('x:' + pos.x + '\ny:' + pos.y) });" >拽</div></div><div style="width:50px; height:50px; line-height:50px; text-align:center; background-color:#F00; position:absolute; cursor:move;" onmousedown="var wc = this,pos;D.start(wc, null, function (property) { pos = property; wc.style.left = property.x + 'px'; wc.style.top = property.y + 'px'; }, function () { alert('x:' + pos.x + '\ny:' + pos.y) });">拽</div><div style="height:1000px;"></div></body></html>
