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_1(bg1,bg2,bg3,bg4){
	with(document){
		getElementById(bg1).className="Title_SRed";
		getElementById(bg2).className="Title_SBlack";
		
	   
		
		getElementById(bg1).style.backgroundImage="url(img/index/TBBG2.jpg)";
		getElementById(bg2).style.backgroundImage="url(img/index/TBBG1.jpg)";
		
		
	}
}