[dm1tr1y]

Воспользовался FireBug-ом..

Все заработало!!!

Ура!!

Вот результат:

<Script language="JavaScript" type="text/javascript"> 
function getElementsByClass(searchClass, node, tag)
	{
		var classElements = new Array();
 
		if (node == null)
			node = document;
 
		if (tag == null)
			tag = '*';
 
		var els = node.getElementsByTagName(tag);
		var elsLen = els.length - 1;
		var pattern = new RegExp("(^|\\s)"+searchClass+"(\\s|$)");
 
		for (i = 0, j = 0; i <= elsLen; i++)
			if (pattern.test(els[i].className))
				{
					classElements[j] = els[i];
					j++;
				}
 
		return classElements;
	}
 
function OpenClose(CName)
	{
		var Elements = getElementsByClass(CName, document, "tr");
		var ElementsLength = Elements.length - 1;
 
		for (i = 0; i <= ElementsLength; i++)
			if (Elements[i].style.display == "")
				{
					Elements[i].style.display = "none";
				}
			else
				{
					Elements[i].style.display = "";
				}
	}
</Script>
 
<table border='1' width='100%'>
<tr bgcolor='red'>
	<td width='33%'>111</td>
	<td width='34%'>222</td>
	<td width='33%'>333</td>
</tr>
<tr>
	<td colspan='3' class="SpoilerTop1" onClick="OpenClose('SpoilerBox1');">123</td>
</tr>
<tr class="SpoilerBox1" style="display:none" bgcolor='blue'>
	<td>111</td>
	<td>222</td>
	<td>333</td>
</tr>
<tr class="SpoilerBox1" style="display:none" bgcolor='blue'>
	<td>111</td>
	<td>222</td>
	<td>333</td>
</tr>
<tr>
	<td colspan='3' class="SpoilerTop2" onClick="OpenClose('SpoilerBox2');">123</td>
</tr>
<tr class="SpoilerBox2" style="display:none" bgcolor='blue'>
	<td>111</td>
	<td>222</td>
	<td>333</td>
</tr>
<tr class="SpoilerBox2" style="display:none" bgcolor='blue'>
	<td>111</td>
	<td>222</td>
	<td>333</td>
</tr>
</table>