https://www.teen-spirits.com/cmn/js/tab_switch.js

1function tabSwitch(tabSwitchOnIdArg, tabSwitchIdArg_ary){
2
3	var tabSwitchOffId_aly = new Array();
4	for(var i = 0; i < tabSwitchIdArg_ary.length; i++){
5		if(tabSwitchIdArg_ary[i] != tabSwitchOnIdArg){
6			tabSwitchOffId_aly.push(tabSwitchIdArg_ary[i]);
7		}
8	}
9
10	var tabSwitchCurrendtabOnId = '';
11	if(tabSwitchCurrendtabOnId != tabSwitchOnIdArg){
12		tabSwitchCurrendtabOnId = tabSwitchOnIdArg;
13		
14		var tabSwitchOnClassName = 'tabSwitchOn';
15		var tabSwitchOffClassName = 'tabSwitchOff';
16		var tabSwitchBtnHeadName = 'tabSwitch-btn-';
17		var tabSwitchContentsHeadName = 'tabSwitch-contents-';
18
19		tabSwitchOnBtnHtml =
20			document.getElementById(tabSwitchBtnHeadName + tabSwitchOnIdArg).innerHTML;
21
22		tmpReOn = new RegExp(tabSwitchOnClassName);
23		tmpReOff = new RegExp(tabSwitchOffClassName);
24		if(tabSwitchOnBtnHtml.match(tmpReOff)){
25			document.getElementById(tabSwitchBtnHeadName + tabSwitchOnIdArg).innerHTML =
26				tabSwitchOnBtnHtml.replace(tmpReOff, tabSwitchOnClassName);
27
28		}else if(!tabSwitchOnBtnHtml.match(tmpReOn)){
29			document.getElementById(tabSwitchBtnHeadName + tabSwitchOnIdArg).innerHTML =
30				'<span class="' + tabSwitchOnClassName + '">' + tabSwitchOnBtnHtml + '</span>';
31		}
32		document.getElementById(tabSwitchContentsHeadName + tabSwitchOnIdArg).style.display = 'block';
33		
34
35		for(var i=0; i < tabSwitchOffId_aly.length; i++){
36			tabSwitchOffBtnHtml =
37				document.getElementById(tabSwitchBtnHeadName + tabSwitchOffId_aly[i]).innerHTML;
38
39			if(tabSwitchOffBtnHtml.match(tmpReOn)){
40				document.getElementById(tabSwitchBtnHeadName + tabSwitchOffId_aly[i]).innerHTML =
41					tabSwitchOffBtnHtml.replace(tmpReOn, tabSwitchOffClassName);
42
43			}else if(!tabSwitchOffBtnHtml.match(tmpReOff)){
44				document.getElementById(tabSwitchBtnHeadName + tabSwitchOffId_aly[i]).innerHTML =
45					'<span class="' + tabSwitchOffClassName + '">' + tabSwitchOffBtnHtml + '</span>';
46			}
47
48			document.getElementById(tabSwitchContentsHeadName + tabSwitchOffId_aly[i]).style.display = 'none';
49		}
50	}
51}