if(document.images){
	//3_0
	var sn_3_11_over=new Image(); sn_3_11_over.src="/img/sn_3_11_over.gif";
	var sn_3_11_off=new Image(); sn_3_11_off.src="/img/sn_3_11_off.gif";	
	
	var sn_3_1_over=new Image(); sn_3_1_over.src="/img/sn_3_1_over.gif";
	var sn_3_1_off=new Image(); sn_3_1_off.src="/img/sn_3_1_off.gif";
	var sn_3_2_over=new Image(); sn_3_2_over.src="/img/sn_3_2_over.gif";
	var sn_3_2_off=new Image(); sn_3_2_off.src="/img/sn_3_2_off.gif";
	var sn_3_3_over=new Image(); sn_3_3_over.src="/img/sn_3_3_over.gif";
	var sn_3_3_off=new Image(); sn_3_3_off.src="/img/sn_3_3_off.gif";
	var sn_3_4_over=new Image(); sn_3_4_over.src="/img/sn_3_4_over.gif";
	var sn_3_4_off=new Image(); sn_3_4_off.src="/img/sn_3_4_off.gif";
	var sn_3_5_over=new Image(); sn_3_5_over.src="/img/sn_3_5_over.gif";
	var sn_3_5_off=new Image(); sn_3_5_off.src="/img/sn_3_5_off.gif";
	var sn_3_6_over=new Image(); sn_3_6_over.src="/img/sn_3_6_over.gif";
	var sn_3_6_off=new Image(); sn_3_6_off.src="/img/sn_3_6_off.gif";		
	var sn_3_7_over=new Image(); sn_3_7_over.src="/img/sn_3_7_over.gif";
	var sn_3_7_off=new Image(); sn_3_7_off.src="/img/sn_3_7_off.gif";	
	var sn_3_8_over=new Image(); sn_3_8_over.src="/img/sn_3_8_over.gif";
	var sn_3_8_off=new Image(); sn_3_8_off.src="/img/sn_3_8_off.gif";				
	var sn_3_9_over=new Image(); sn_3_9_over.src="/img/sn_3_9_over.gif";
	var sn_3_9_off=new Image(); sn_3_9_off.src="/img/sn_3_9_off.gif";	
	//var sn_3_10_over=new Image(); sn_3_10_over.src="/img/sn_3_10_over.gif";
	//var sn_3_10_off=new Image(); sn_3_10_off.src="/img/sn_3_10_off.gif";	
}