页面元素拖拽效果 · 武功秘籍大全

~~~ <!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title>慕课网-拖拽效果</title> <style type="text/css"> body { background: url(images/baidu_demo.png) #fff top center no-repeat; padding: 0px; margin: 0px; font-size: 12px; font-family: "微软雅黑"; } .link { text-align: right; line-height: 20px; padding-right: 40px; } .ui-dialog { width: 380px; height: auto; display: none; position: absolute; z-index: 9000; top: 0px; left: 0px; border: 1px solid #D5D5D5; background: #fff; } .ui-dialog a { text-decoration: none; } .ui-dialog-title { height: 48px; line-height: 48px; padding: 0px 20px; color: #535353; font-size: 16px; border-bottom: 1px solid #efefef; background: #f5f5f5; cursor: move; user-select: none; } .ui-dialog-closebutton { width: 16px; height: 16px; display: block; position: absolute; top: 12px; right: 20px; background: url(images/close_def.png) no-repeat; cursor: pointer; } .ui-dialog-closebutton:hover { background: url(images/close_hov.png); } .ui-dialog-content { padding: 15px 20px; } .ui-dialog-pt15 { padding-top: 15px; } .ui-dialog-l40 { height: 40px; line-height: 40px; text-align: right; } .ui-dialog-input { width: 100%; height: 40px; margin: 0px; padding: 0px; border: 1px solid #d5d5d5; font-size: 16px; color: #c1c1c1; text-indent: 25px; outline: none; } .ui-dialog-input-username { background: url(images/input_username.png) no-repeat 2px; } .ui-dialog-input-password { background: url(images/input_password.png) no-repeat 2px; } .ui-dialog-submit { width: 100%; height: 50px; background: #3b7ae3; border: none; font-size: 16px; color: #fff; outline: none; text-decoration: none; display: block; text-align: center; line-height: 50px; } .ui-dialog-submit:hover { background: #3f81b0; } .ui-mask { width: 100%; height: 100%; background: #000; position: absolute; top: 0px; height: 0px; z-index: 8000; opacity: 0.4; filter: Alpha(opacity=40); } </style> </head> <body> <div class="link"> <a href="javascript:showDialog();">登录</a> </div> <div class="ui-mask" id="mask" onselectstart="return false"></div> <div class="ui-dialog" id="dialogMove" onselectstart='return false;'> <div class="ui-dialog-title" id="dialogDrag" onselectstart="return false;"> 登录通行证 <a class="ui-dialog-closebutton" href="javascript:hideDialog();"></a> </div> <div class="ui-dialog-content"> <div class="ui-dialog-l40 ui-dialog-pt15"> <input class="ui-dialog-input ui-dialog-input-username" type="input" value="手机/邮箱/用户名"/> </div> <div class="ui-dialog-l40 ui-dialog-pt15"> <input class="ui-dialog-input ui-dialog-input-password" type="input" value="密码"/> </div> <div class="ui-dialog-l40"> <a href="#">忘记密码</a> </div> <div> <a class="ui-dialog-submit" href="#">登录</a> </div> <div class="ui-dialog-l40"> <a href="#">立即注册</a> </div> </div> </div> <script type="text/javascript"> var dialogInstace, onMoveStartId, mousePos = {x: 0, y: 0}; // 用于记录当前可拖拽的对象 // var zIndex = 9000; // 获取元素对象 function g(id) { return document.getElementById(id); } // 自动居中元素（el = Element） function autoCenter(el) { var bodyW = document.documentElement.clientWidth; var bodyH = document.documentElement.clientHeight; var elW = el.offsetWidth; var elH = el.offsetHeight; el.style.left = (bodyW - elW) / 2 + 'px'; el.style.top = (bodyH - elH) / 2 + 'px'; } // 自动扩展元素到全部显示区域 function fillToBody(el) { el.style.width = document.documentElement.clientWidth + 'px'; el.style.height = document.documentElement.clientHeight + 'px'; } // Dialog实例化的方法 function Dialog(dragId, moveId) { var instace = {}; instace.dragElement = g(dragId); // 允许执行拖拽操作的元素 instace.moveElement = g(moveId); // 拖拽操作时，移动的元素 instace.mouseOffsetLeft = 0; // 拖拽操作时，移动元素的起始 X 点 instace.mouseOffsetTop = 0; // 拖拽操作时，移动元素的起始 Y 点 instace.dragElement.addEventListener('mousedown', function (e) { var e = e || window.event; dialogInstace = instace; instace.mouseOffsetLeft = e.pageX - instace.moveElement.offsetLeft; instace.mouseOffsetTop = e.pageY - instace.moveElement.offsetTop; onMoveStartId = setInterval(onMoveStart, 10); return false; // instace.moveElement.style.zIndex = zIndex ++; }); return instace; } // 在页面中侦听鼠标弹起事件 document.onmouseup = function (e) { dialogInstace = false; clearInterval(onMoveStartId); }; document.onmousemove = function (e) { var e = window.event || e; mousePos.x = e.clientX; mousePos.y = e.clientY; e.stopPropagation && e.stopPropagation(); e.cancelBubble = true; e = this.originalEvent; e && (e.preventDefault ? e.preventDefault() : e.returnValue = false); document.body.style.MozUserSelect = 'none'; }; function onMoveStart() { var instace = dialogInstace; if (instace) { var maxX = document.documentElement.clientWidth - instace.moveElement.offsetWidth; var maxY = document.documentElement.clientHeight - instace.moveElement.offsetHeight; instace.moveElement.style.left = Math.min(Math.max((mousePos.x - instace.mouseOffsetLeft), 0), maxX) + 'px'; instace.moveElement.style.top = Math.min(Math.max((mousePos.y - instace.mouseOffsetTop), 0), maxY) + 'px'; } } // 重新调整对话框的位置和遮罩，并且展现 function showDialog() { g('dialogMove').style.display = 'block'; g('mask').style.display = 'block'; autoCenter(g('dialogMove')); fillToBody(g('mask')); } // 关闭对话框 function hideDialog() { g('dialogMove').style.display = 'none'; g('mask').style.display = 'none'; } // 侦听浏览器窗口大小变化 window.onresize = showDialog; Dialog('dialogDrag', 'dialogMove'); showDialog(); </script> </body> </html> ~~~