function chng_css(new_css)
{
document.getElementById(new_css).className='leftbH0'
}
function chng_css2(new_css)
{
document.getElementById(new_css).className='leftbSH0'
}

function chng_zoom(new_zoom)
{
	if (document.getElementById(new_zoom).style.visibility=='hidden')
	{
	document.getElementById(new_zoom).style.visibility='visible'
	document.getElementById(new_zoom).style.zoom='100%'
	}
	else
	{
	document.getElementById(new_zoom).style.visibility='hidden'
	document.getElementById(new_zoom).style.zoom='1%'
	}
}