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<!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>HoverMenu</title> <head> <script type="text/javascript"> function addEvent(obj, evType, fn){ if (obj.addEventListener){ obj.addEventListener(evType, fn, false); return true; } else if (obj.attachEvent){ var r = obj.attachEvent("on"+evType, fn); return r; } else { return false; } } function removeEvent(obj, evType, fn, useCapture){ if (obj.removeEventListener){ obj.removeEventListener(evType, fn, useCapture); return true; } else if (obj.detachEvent){ var r = obj.detachEvent("on"+evType, fn); return r; } else { alert("Handler could not be removed"); } } function initHoverMenu(){ var elms = document.getElementsByTagName('a'); for (i = 0; i < elms.length; i++) { if (elms[i].className.indexOf("HoverMenu") == 0) { addEvent(elms[i],'mouseover',showHoverMenu); addEvent(elms[i],'mouseout',hidHoverMenu); } } } function showHoverMenu(e){ var Pos = getPosition(e); var menu = createMenu(); menu.style.display = "block"; menu.style.top = Pos.y + "px";//要加"px"否则不兼容FF menu.style.left = Pos.x + "px"; } function hidHoverMenu(){ var menu = createMenu(); menu.style.display = "none"; } function createMenu(){ if(createMenu._init == undefined){ theBody = document.getElementsByTagName('BODY')[0]; menu = document.createElement('div'); menu.id = "MenuID"; menu.style.position = 'absolute'; menu.innerHTML = "this is Menu"; menu.style.top = 100; theBody.appendChild(menu); createMenu._init = 1; } return menu; } function getPosition(e){//要兼容FF的话,这个参数一定要写上 e = window.event || e; srcElement = e.srcElement || e.target; var top = srcElement.getBoundingClientRect().top + getScrollTop(); var left = srcElement.getBoundingClientRect().right + getScrollLeft(); return {x:left, y:top}; } function getScrollTop() { if (self.pageYOffset) // all except Explorer { return self.pageYOffset; } else if (document.documentElement && document.documentElement.scrollTop) // Explorer 6 Strict { return document.documentElement.scrollTop; } else if (document.body) // all other Explorers { return document.body.scrollTop; } } function getScrollLeft() { if (self.pageXOffset) // all except Explorer { return self.pageXOffset; } else if (document.documentElement && document.documentElement.scrollLeft) // Explorer 6 Strict { return document.documentElement.scrollLeft; } else if (document.body) // all other Explorers { return document.body.scrollLeft; } } addEvent(window,'load',initHoverMenu); </script> </head> <body> <a href="#" id="ima" class="HoverMenu">菜单</a><br> <a href="#" id="ima" class="HoverMenu">菜单</a><br> <a href="#" id="ima" class="HoverMenu">菜单</a> </body> </html>
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