function ArtChangeBg(name, id, num)
{
	for(var i=1; i<=4; i++)
	{
		if( document.getElementById(name+i) != null )
		{
			if( i == 1 )
			{
				document.getElementById(name+i).style.backgroundImage='url(images/icon/bg1_2.jpg)'
			}
			else
			{
				document.getElementById(name+i).style.backgroundImage='url(images/icon/bg3_2.jpg)'	
			}
			document.getElementById(name+i).style.fontWeight='normal';
		}
	}
	if(id.toString().indexOf("1") > -1)
	{
		document.getElementById(id).style.backgroundImage='url(images/icon/bg1_1.jpg)'	
	}
	else
	{
		document.getElementById(id).style.backgroundImage='url(images/icon/bg3_1.jpg)'
	}	
	document.getElementById(id).style.fontWeight='bold';
	document.getElementById(name).innerHTML = document.getElementById(name+"_"+num).innerHTML;
}