#tip_base{
    WHITE-SPACE: nowrap;POSITION: absolute;width:expression(tip_top.offsetWidth+"px");overflow:hidden;
}
#tip_top{
    BORDER-RIGHT: #000 1px solid;BORDER-TOP: #000 1px solid;BORDER-LEFT: #000 1px solid;BORDER-BOTTOM: medium none; 
	PADDING-RIGHT: 2px; PADDING-LEFT: 2px;PADDING-BOTTOM: 4px;  PADDING-TOP: 2px; 
	BACKGROUND: #ffc; overflow:hidden;
}
#tip_bottom1{
    height:5px;width:16px;float:left;
}
#tip_bottom2{
    height:5px;BORDER-TOP: #000 1px solid;overflow:hidden;width:expression((parseInt(tip_top.offsetWidth)-16)+"px"); float:left;
}