首页 > 代码库 > js笔记---拖动元素
js笔记---拖动元素
<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml"><head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title></title> <style> #img1 { position: absolute; } </style> <script type="text/javascript"> window.onload = function () { var oImg = document.getElementById(‘img1‘); drop(oImg); } function drop(obj) { obj.onmousedown = function (ev) { var ev = ev || event; var liw = ev.clientX - parseInt(getStyle(obj, ‘left‘) == ‘auto‘ ? ‘0‘ : getStyle(obj, ‘left‘)); var lit = ev.clientY - parseInt(getStyle(obj, ‘top‘) == ‘auto‘ ? ‘0‘ : getStyle(obj, ‘top‘)); if (obj.getCaptrue) { obj.getCaptrue(); } document.onmousemove = function (ev) { var ev = ev || event; var L = ev.clientX - liw; var T = ev.clientY - lit; if (L < 100) { L = 0; } if (L > document.documentElement.clientWidth - obj.offsetWidth-100) { L = (document.documentElement.clientWidth - obj.offsetWidth); } if (T < 100) { T = 0; } if (T > document.documentElement.clientHeight - obj.offsetHeight - 100) { T = (document.documentElement.clientHeight - obj.offsetHeight); } obj.style.left = L + ‘px‘; obj.style.top = T + ‘px‘; } document.onmouseup = function () { document.onmousemove = document.onmouseup = null; if (obj.relaseCaptrue) { obj.relaseCaptrue(); } } return false; } } function getStyle(obj, attr) { if (obj.currentStyle) { return obj.currentStyle[attr]; } else { return getComputedStyle(obj, false)[attr]; } } </script></head><body> <img src="http://www.mamicode.com/images/btn_04.jpg" id="img1" /> <!--<img src="http://www.mamicode.com/images/btn_02.jpg" />--></body></html>
js笔记---拖动元素
声明：以上内容来自用户投稿及互联网公开渠道收集整理发布，本网站不拥有所有权，未作人工编辑处理，也不承担相关法律责任，若内容有误或涉及侵权可进行投诉： 投诉/举报 工作人员会在5个工作日内联系你，一经查实，本站将立刻删除涉嫌侵权内容。