var timeout=null;
function changeTable(tablename,tablenum,l){
	if(tablenum!=0)
		document.getElementById(tablename+tablenum).style.display="block";
	for(var i=1;i<=l;i++){
		if(tablename+i!=tablename+tablenum)
			document.getElementById(tablename+i).style.display="none";
	}
}

function changeBg_2(bg1,bg2,bg3,bg4,bg5,bg6,bg7){
	with(document){
		getElementById(bg1).style.backgroundImage="url(images/pic_17.gif)";
		getElementById(bg2).style.backgroundImage="url(images/pic_18.gif)";
		getElementById(bg3).style.backgroundImage="url(images/pic_18.gif)";
		getElementById(bg4).style.backgroundImage="url(images/pic_18.gif)";
		getElementById(bg5).style.backgroundImage="url(images/pic_18.gif)";
		getElementById(bg6).style.backgroundImage="url(images/pic_18.gif)";
		getElementById(bg7).style.backgroundImage="url(images/pic_18.gif)";
	}
}