// JavaScript Document

function opacity1()
{
	a=document.getElementById("tut_by");
	a.className = "tut_by";
}

function opacity2()
{
	a=document.getElementById("tut_by");
	a.className = "tut_by2";
	
}
function opacity3()
{
	b=document.getElementById("live");
	b.className = "live";
}

function opacity4()
{
	b=document.getElementById("live");
	b.className = "live2";
	
}
function opacity5()
{
	c=document.getElementById("video");
	c.className = "video";
}

function opacity6()
{
	c=document.getElementById("video");
	c.className = "video2";
	
}