function expansion(tName,arrow,aImg,bImg) {
	if($("#"+tName).css("display")=="none"){
		$("#"+tName).css("display", "block");
		if(arrow){ $("#"+arrow).css("background-image", "url(/img/common/icon/11.gif)"); }
		if(aImg){ $("#"+arrow+" img").attr("src",aImg); }
	}else{
		$("#"+tName).css("display", "none");
		if(arrow){ $("#"+arrow).css("background-image", "url(/img/common/icon/10.gif)"); }
		if(bImg){ $("#"+arrow+" img").attr("src",bImg); }
	}
}