if (document.images) {
	 

	 
	b1_on = new Image();
	b1_on.src = "images/1-on.gif";
	b1_off = new Image();
	b1_off.src = "images/1-off.gif";
	
	b2_on = new Image();
	b2_on.src = "images/2-on.gif";
	b2_off = new Image();
	b2_off.src = "images/2-off.gif";
	
	b3_on = new Image();
	b3_on.src = "images/3-on.gif";
	b3_off = new Image();
	b3_off.src = "images/3-off.gif";
	
	b4_on = new Image();
	b4_on.src = "images/4-on.gif";
	b4_off = new Image();
	b4_off.src = "images/4-off.gif";
	
	b5_on = new Image();
	b5_on.src = "images/5-on.gif";
	b5_off = new Image();
	b5_off.src = "images/5-off.gif";
	
		b6_on = new Image();
	b6_on.src = "images/6-on.gif";
	b6_off = new Image();
	b6_off.src = "images/6-off.gif";
	
		b7_on = new Image();
	b7_on.src = "images/7-on.gif";
	b7_off = new Image();
	b7_off.src = "images/7-off.gif";
	
	b8_on = new Image();
	b8_on.src = "images/8-on.gif";
	b8_off = new Image();
	b8_off.src = "images/8-off.gif";
	
	b9_on = new Image();
	b9_on.src = "images/9-on.gif";
	b9_off = new Image();
	b9_off.src = "images/9-off.gif";
	b10_on = new Image();
	b10_on.src = "images/10-on.gif";
	b10_off = new Image();
	b10_off.src = "images/10-off.gif";	
	
		b11_on = new Image();
	b11_on.src = "images/11-on.gif";
	b11_off = new Image();
	b11_off.src = "images/11-off.gif";	
	
	
						} 
function dsgo(imgName) { 
        if (document.images) { 
            document[imgName].src = eval(imgName + "_on.src"); 
        } 
} 
function dsleave(imgName) { 
        if (document.images) { 
            document[imgName].src = eval(imgName + "_off.src"); 
        } 
}