function getElementsByAttr(prnt, attr, val)
{
	var result = new Array();
	var i;
	var j;
	var tempObj;
	var subRes;
	for(i=0; i<prnt.childNodes.length; i++)
	{
		tempObj = prnt.childNodes[i];
		if(tempObj.getAttribute)
		{
			if(tempObj.getAttribute(attr) == val)
			{
				result.push(tempObj);
			}
		}
		subRes = getElementsByAttr(tempObj, attr, val);
		for(j in subRes)
		{
			result.push(subRes[j]);
		}
	}
	return result;
}
function getElementsByClass(prnt, val)
{
	var result = new Array();
	var i;
	var j;
	var tempObj;
	var subRes;
	for(i=0; i<prnt.childNodes.length; i++)
	{
		tempObj = prnt.childNodes[i];
		if(tempObj.getAttribute)
		{
			if(tempObj.className == val)
			{
				
				result.push(tempObj);
			}
		}
		
		subRes = getElementsByClass(tempObj, val);
		for(j in subRes)
		{
			result.push(subRes[j]);
		}
	}
	return result;
}

function getElementsByTagName(prnt, val)
{
	var result = new Array();
	var i;
	var j;
	var tempObj;
	var subRes;
	for(i=0; i<prnt.childNodes.length; i++)
	{
		tempObj = prnt.childNodes[i];
		if(tempObj.getAttribute)
		{
			if(tempObj.tagName == val)
			{
				
				result.push(tempObj);
			}
		}
		
		subRes = getElementsByTagName(tempObj, val);
		for(j in subRes)
		{
			result.push(subRes[j]);
		}
	}
	return result;
}

function setOpacity(obj, val)
{
	if(typeof obj.style.opacity == 'string')
	{
		obj.style.opacity = val;
	}
	else
	{
		val*=100;
		obj.style.filter = "progid:DXImageTransform.Microsoft.Alpha(opacity="+val+")";
	}
}