.div_slider{
    width:950px;
	margin:5px auto 0px auto;
}
#slider{}	
#slider1 {
    width: 600px; /* important to be same as image width */
    height: 280px; /* important to be same as image height */
    position: relative; /* important */
	overflow: hidden; /* important */
}
#slider li{ 
	/* 
		define width and height of list item (slide)
		entire slider area will adjust according to the parameters provided here
	*/ 
	width:600px;
	height:280px;
	overflow:hidden; 
}
#slider li img{ 
	width:600px;
	height:280px;
}			
#prevBtn, #nextBtn{ 
	display:block;
	width:30px;
	height:77px;
	position:absolute;
	left:-30px;
	top:71px;
	}	
#nextBtn{ 
	left:696px;
	}														
#prevBtn a, #nextBtn a{  
	display:block;
	width:30px;
	height:77px;
	background:url(images/btn_prev.gif) no-repeat 0 0;	
	}	
#nextBtn a{ 
	background:url(images/btn_next.gif) no-repeat 0 0;	
	}