Heim > Artikel > Web-Frontend > JavaScript-Methode zum Erzielen eines Ebenenerweiterungseffekts nach Mausklick_Javascript-Kenntnisse
Das Beispiel in diesem Artikel beschreibt, wie Sie mithilfe von JavaScript den Ebenenerweiterungseffekt nach einem Mausklick erzielen. Teilen Sie es als Referenz mit allen. Die spezifische Analyse lautet wie folgt:
Dieser JavaScript-Code kann die Funktion zum Erweitern der Ebene nach einem Mausklick realisieren. Der Code ist etwas kompliziert und konzentriert sich auf Lernen und Recherche. Wenn Sie interessiert sind, können Sie ihn ändern und vereinfachen.
<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>层展开折叠</title> </head> <body> <style type="text/css"> DIV.clTopMenu{ position:absolute; width:101; height:150; clip:rect(0,101,14,0); visibility:hidden; z-index:31; layer-background-color:#EEEEEE; background-color:#00CCFF } DIV.clTopMenuBottom{ position:absolute; width:101; height:3; clip:rect(0,101,3,0); top:11; layer-background-color:#CECFCE; background-color:#000099; z-index:2 } DIV.clTopMenuText{ position:absolute; width:91; left:5; top:15; font-family:"Arial", "Helvetica", "sans-serif"; font-size:9pt; background-color:#EEEEEE; z-index:1; color: #000000 } a:link { color: #000000; text-decoration: none } </style> <script language="JavaScript" type="text/javascript"> function lib_bwcheck(){ //Browsercheck (needed) this.ver=navigator.appVersion this.agent=navigator.userAgent this.dom=document.getElementById?1:0 this.opera5=this.agent.indexOf("Opera 5")>-1 this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom && !this.opera5)?1:0; this.ie6=(this.ver.indexOf("MSIE 6")>-1 && this.dom && !this.opera5)?1:0; this.ie4=(document.all && !this.dom && !this.opera5)?1:0; this.ie=this.ie4||this.ie5||this.ie6 this.mac=this.agent.indexOf("Mac")>-1 this.ns6=(this.dom && parseInt(this.ver) >= 5) ?1:0; this.ns4=(document.layers && !this.dom)?1:0; this.bw=(this.ie6 || this.ie5 || this.ie4 || this.ns4 || this.ns6 || this.opera5) return this } var bw=new lib_bwcheck() nPlace=0 var nNumberOfMenus=2 var nMwidth=101 var nPxbetween=20 var nFromleft=10 var nFromtop=20 var nBgcolor='#CECFCE' var nBgcolorchangeto='#6380BC' var nImageheight=11 function makeNewsMenu(obj,nest){ nest=(!nest) ? "":'document.'+nest+'.' this.css=bw.dom? document.getElementById(obj).style:bw.ie4?document.all[obj].style:bw.ns4?eval(nest+"document.layers." +obj):0; this.evnt=bw.dom? document.getElementById(obj):bw.ie4?document.all[obj]:bw.ns4?eval(nest+"document.layers." +obj):0; this.scrollHeight=bw.ns4?this.css.document.height:this.evnt.offsetHeight this.moveIt=b_moveIt;this.bgChange=b_bgChange; this.slideUp=b_slideUp; this.slideDown=b_slideDown; this.clipTo=b_clipTo; this.obj = obj + "Object"; eval(this.obj + "=this") } function b_moveIt(x,y){this.x=x; this.y=y; this.css.left=this.x; this.css.top=this.y} function b_bgChange(color){if(bw.dom || bw.ie4) this.css.backgroundColor=color; else this.css.bgColor=color} function b_clipTo(t,r,b,l){ if(bw.ns4){this.css.clip.top=t; this.css.clip.right=r; this.css.clip.bottom=b; this.css.clip.left=l }else this.css.clip="rect("+t+","+r+","+b+","+l+")"; } function b_slideUp(ystop,moveby,speed,fn,wh){ if(!this.slideactive){ if(this.y>ystop){ this.moveIt(this.x,this.y-5); eval(wh) setTimeout(this.obj+".slideUp("+ystop+","+moveby+","+speed+",'"+fn+"','"+wh+"')",speed) }else{ this.slideactive=false; this.moveIt(0,ystop); eval(fn) } } } function b_slideDown(ystop,moveby,speed,fn,wh){ if(!this.slideactive){ if(this.y<ystop){ this.moveIt(this.x,this.y+5); eval(wh) setTimeout(this.obj+".slideDown("+ystop+","+moveby+","+speed+",'"+fn+"','"+wh+"')",speed) }else{ this.slideactive=false; this.moveIt(0,ystop); eval(fn) } } } function newsMenuInit(){ oTopMenu=new Array() zindex=10 for(i=0;i<=nNumberOfMenus;i++){ oTopMenu[i]=new Array() oTopMenu[i][0]=new makeNewsMenu('divTopMenu'+i) oTopMenu[i][1]=new makeNewsMenu('divTopMenuBottom'+i,'divTopMenu'+i) oTopMenu[i][2]=new makeNewsMenu('divTopMenuText'+i,'divTopMenu'+i) oTopMenu[i][1].moveIt(0,nImageheight) oTopMenu[i][0].clipTo(0,nMwidth,nImageheight+3,0) if(!nPlace) oTopMenu[i][0].moveIt(i*nMwidth+nFromleft+(i*nPxbetween),nFromtop) else{ oTopMenu[i][0].moveIt(nFromleft,i*nImageheight+nFromtop+(i*nPxbetween)) oTopMenu[i][0].css.zIndex=zindex-- } oTopMenu[i][0].css.visibility="visible" } } function topMenu(num){ if(oTopMenu[num][1].y==nImageheight) oTopMenu[num][1].slideDown(oTopMenu[num][2].scrollHeight+20,10,40,'oTopMenu['+num+'][0].clipTo(0,nMwidth,oTopMenu['+num+'][1].y+3,0)','oTopMenu['+num+'][0].clipTo(0,nMwidth,oTopMenu['+num+'][1].y+3,0)') else if(oTopMenu[num][1].y==oTopMenu[num][2].scrollHeight+20) oTopMenu[num][1].slideUp(nImageheight,10,40,'oTopMenu['+num+'][0].clipTo(0,nMwidth,oTopMenu['+num+'][1].y+3,0)','oTopMenu['+num+'][0].clipTo(0,nMwidth,oTopMenu['+num+'][1].y+3,0)') } function menuOver(num){oTopMenu[num][1].bgChange(nBgcolorchangeto)} function menuOut(num){oTopMenu[num][1].bgChange(nBgcolor)} onload=newsMenuInit; </script> <div id="divTopMenu0" class="clTopMenu" align="center" style="height: 170; left: 20; top: 20"><span class="css3"><a href="#" onMouseOver="menuOver(0)" onMouseOut="menuOut(0)" onClick="topMenu(0); if(bw.dom || bw.ie4)this.blur(); return false">点击展开</a> </span> <div id="divTopMenuText0" class="clTopMenuText"> <span class="css3"> 鼠标点击后层展开JavaScript鼠标点击后层展开JavaScript。 </span> </div> <div id="divTopMenuBottom0" class="clTopMenuBottom" style="top: 11; height: 10"></div> </div> </div> </body> </html>
Ich hoffe, dass dieser Artikel für das JavaScript-Programmierdesign aller hilfreich sein wird.