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比较精简的Javascript拖动效果函数代码

时间：2021-07-01 10:21:17 帮助过：4人阅读

<html> <head><title>拖动效果函数演示 by Longbill.cn</title> <style> body { font-size:12px; color:#333333; border : 0px solid blue; } div { position : absolute; background-color : #c3d9ff; margin : 0px; padding : 5px; border : 0px; width : 100px; height:100px; } </style> </head> <body> <script> function drag(o,s) { if (typeof o == "string") o = document.getElementById(o); o.orig_x = parseInt(o.style.left) - document.body.scrollLeft; o.orig_y = parseInt(o.style.top) - document.body.scrollTop; o.orig_index = o.style.zIndex; o.onmousedown = function(a) { this.style.cursor = "move"; this.style.zIndex = 10000; var d=document; if(!a)a=window.event; var x = a.clientX+d.body.scrollLeft-o.offsetLeft; var y = a.clientY+d.body.scrollTop-o.offsetTop; //author: www.longbill.cn d.ondragstart = "return false;" d.onselectstart = "return false;" d.onselect = "document.selection.empty();" if(o.setCapture) o.setCapture(); else if(window.captureEvents) window.captureEvents(Event.MOUSEMOVE|Event.MOUSEUP); d.onmousemove = function(a) { if(!a)a=window.event; o.style.left = a.clientX+document.body.scrollLeft-x; o.style.top = a.clientY+document.body.scrollTop-y; o.orig_x = parseInt(o.style.left) - document.body.scrollLeft; o.orig_y = parseInt(o.style.top) - document.body.scrollTop; } d.onmouseup = function() { if(o.releaseCapture) o.releaseCapture(); else if(window.captureEvents) window.captureEvents(Event.MOUSEMOVE|Event.MOUSEUP); d.onmousemove = null; d.onmouseup = null; d.ondragstart = null; d.onselectstart = null; d.onselect = null; o.style.cursor = "normal"; o.style.zIndex = o.orig_index; } } if (s) { var orig_scroll = window.onscroll?window.onscroll:function (){}; window.onscroll = function () { orig_scroll(); o.style.left = o.orig_x + document.body.scrollLeft; o.style.top = o.orig_y + document.body.scrollTop; } } } </script> div1:我可以被拖动 div2:来拖我呀 div3:我随便你拖 div4:我可以随窗口滑动，把我拖到最下面，然后滚动网页看看作者: Longbill www.longbill.cn 参数说明: drag(obj [,scroll]); obj:对象的id或对象本身; scroll(可选):对象是否随窗口拖动而滑动，默认为否鼠标右键查看源代码 <script> drag("div1"); drag("div2"); drag("div3"); drag("div4",1); drag("div5",1); drag("div6",1); </script> </body>
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比较精简的Javascript拖动效果函数代码

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