windows XP左侧的菜单效果

<style type="text/css"> .mainDiv { width:160px; } .topItem { width:160px; height:22px; cursor:pointer; background: #467BF2; text-decoration: none; color: white; font-weight:bold; font-family:"GOTHIC"; } .dropMenu { background:#D9D9D9; border-top:1px solid #467BF2; border-left:1px solid #92B1F8; border-right:1px solid #92B1F8; border-bottom:1px solid #92B1F8; } .subMenu { display:none; } .subItem { padding-left:5px; cursor:pointer; font-weight:bold; text-decoration:none; color:black; } .subItem a { text-decoration:none; color:black; } .subItemOver { cursor:pointer; color:blue; text-decoration:underline; font-weight:bold; padding-left:5px; } .subItemOver a { color:blue; } .drop { border-left:1px solid black; border-right:1px solid black; }</style><script language="javascript"> var TIMER_SLIDE = null; var OBJ_SLIDE; var OBJ_VIEW; var PIX_SLIDE = 10; //this is the amount of slide/DELAY_SLIDE var NEW_PIX_VAL; var DELAY_SLIDE = 30; //this is the time between each call to slide var DIV_HEIGHT = 22; //value irrelevant var SUB_MENU_NUM =0; var RE_INIT_OBJ = null; var bMenu = document.getElementById("curMenu"); var MainDiv,SubDiv //DD added code document.write('<div id="tempcontainer" class="mainDiv" style="visibility: hidden; position: absolute"></div>') function Init(objDiv) { if (TIMER_SLIDE == null) { SUB_MENU_NUM = 0; MainDiv = objDiv.parentNode; SubDiv = MainDiv.getElementsByTagName("DIV").item(0); SubDiv.onclick = SetSlide; OBJ_SLIDE = MainDiv.getElementsByTagName("DIV").item(1) OBJ_VIEW = OBJ_SLIDE.getElementsByTagName("DIV").item(0); document.getElementById("tempcontainer").innerHTML=MainDiv.getElementsByTagName("DIV").item(2).innerHTML //DD added code DIV_HEIGHT=document.getElementById("tempcontainer").offsetHeight //DD added code for (i=0;i<OBJ_VIEW.childNodes.length;i++) { if (OBJ_VIEW.childNodes.item(i).tagName == "SPAN") { SUB_MENU_NUM ++; OBJ_VIEW.childNodes.item(i).onmouseover= ChangeStyle; OBJ_VIEW.childNodes.item(i).onmouseout= ChangeStyle; } } NEW_PIX_VAL = parseInt(MainDiv.getAttribute("state")); } } function SetSlide() { if (window.TIMER_SLIDE) clearInterval(TIMER_SLIDE) //DD added code if (TIMER_SLIDE == null && this.parentNode == MainDiv) TIMER_SLIDE = setInterval('RunSlide()', DELAY_SLIDE); else { RE_INIT_OBJ = this; setTimeout('ReInit()', 200); } } function ReInit(obj) { Init(RE_INIT_OBJ); TIMER_SLIDE = setInterval('RunSlide()', DELAY_SLIDE); RE_INIT_OBJ = null; } function RunSlide() { if (OBJ_VIEW.getAttribute("state") == 0) { NEW_PIX_VAL += PIX_SLIDE; OBJ_SLIDE.style.height = NEW_PIX_VAL; if (NEW_PIX_VAL >= DIV_HEIGHT) //DD modified code { clearInterval(TIMER_SLIDE); TIMER_SLIDE = null; OBJ_VIEW.style.display = 'inline'; OBJ_VIEW.setAttribute("state","1") MainDiv.setAttribute("state",NEW_PIX_VAL); } } else { OBJ_VIEW.style.display = 'none'; NEW_PIX_VAL -= PIX_SLIDE; if(NEW_PIX_VAL > 0)OBJ_SLIDE.style.height = NEW_PIX_VAL; if (NEW_PIX_VAL <= 0) { NEW_PIX_VAL = 0; OBJ_SLIDE.style.height = NEW_PIX_VAL clearInterval(TIMER_SLIDE); TIMER_SLIDE = null; OBJ_VIEW.setAttribute("state","0") MainDiv.setAttribute("state",NEW_PIX_VAL); } } } function ChangeStyle() { if (this.className == this.getAttribute("classOut")) this.className = this.getAttribute("classOver"); else this.className = this.getAttribute("classOut"); } </script><!--------Start Menu----------> <div class="mainDiv" state="0"> <div class="topItem" onmouseover="Init(this);" classout="topItem" classover="topItemOver">网页特效</div> <div class="dropMenu"> <div class="subMenu" state="0"><span class="subItem" classout="subItem" classover="subItemOver"><a href="http://www.askzhan.com">图形图像</a></span><br /><span class="subItem" classout="subItem" classover="subItemOver"><a href="http://www.askzhan.com">鼠标事件</a></span><br /><span class="subItem" classout="subItem" classover="subItemOver"><a href="http://www.askzhan.com">时间日期</a></span><br /><span class="subItem" classout="subItem" classover="subItemOver"><a href="http://www.askzhan.com">导航菜单</a></span><br /><span class="subItem" classout="subItem" classover="subItemOver"><a href="http://www.askzhan.com">文字效果</a></span> </div> </div> </div> <!--------End Menu----------><br /><!--------Start Menu----------> <div class="mainDiv" state="0"> <div class="topItem" onmouseover="Init(this)" classout="topItem" classover="topItemOver">网页教学</div> <div class="dropMenu"> <div class="subMenu" state="0"><span class="subItem" classout="subItem" classover="subItemOver"><a href="http://www.askzhan.com">网页制作</a></span><br /><span class="subItem" classout="subItem" classover="subItemOver"><a href="http://www.askzhan.com">网络编程</a></span><br /><span class="subItem" classout="subItem" classover="subItemOver"><a href="http://www.askzhan.com">图形图像</a></span> </div> </div> </div> <!--------End Menu----------><br /><!--------Start Menu----------> <div class="mainDiv" state="0"> <div class="topItem" onmouseover="Init(this)" classout="topItem" classover="topItemOver">网络开发</div> <div class="dropMenu"> <div class="subMenu" state="0"><span class="subItem" classout="subItem" classover="subItemOver"><a href="http://www.askzhan.com">网页设计</a></span><br /><span class="subItem" classout="subItem" classover="subItemOver"><a href="http://www.askzhan.com">艺术创作</a></span><br /><span class="subItem" classout="subItem" classover="subItemOver"><a href="http://www.askzhan.com">电脑网络</a></span> </div> </div> </div> <!--------End Menu---------->