if (document.images) {
img1on = new Image();
img1on.src = "http://www.channel4.com/sport/cricket/img/general/nav5_01_on.gif";  
img2on = new Image();
img2on.src = "http://www.channel4.com/sport/cricket/img/general/nav5_02_on.gif";  
img3on = new Image();
img3on.src = "http://www.channel4.com/sport/cricket/img/general/nav5_03_on.gif";  
img4on = new Image();
img4on.src = "http://www.channel4.com/sport/cricket/img/general/nav5_04_on.gif";  
img5on = new Image();
img5on.src = "http://www.channel4.com/sport/cricket/img/general/nav5_05_on.gif";  
img6on = new Image();
img6on.src = "http://www.channel4.com/sport/cricket/img/general/nav5_06_on.gif";  
img7on = new Image();
img7on.src = "http://www.channel4.com/sport/cricket/img/general/nav5_07_on.gif";  
img8on = new Image();
img8on.src = "http://www.channel4.com/sport/cricket/img/general/nav5_08_on.gif";  
img9on = new Image();
img9on.src = "http://www.channel4.com/sport/cricket/img/general/nav5_09_on.gif";  
img10on = new Image();
img10on.src = "http://www.channel4.com/sport/cricket/img/general/nav5_10_on.gif";  

img1off = new Image();
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img2off = new Image();
img2off.src = "http://www.channel4.com/sport/cricket/img/general/nav5_02_off.gif";  
img3off = new Image();
img3off.src = "http://www.channel4.com/sport/cricket/img/general/nav5_03_off.gif";  
img4off = new Image();
img4off.src = "http://www.channel4.com/sport/cricket/img/general/nav5_04_off.gif";  
img5off = new Image();
img5off.src = "http://www.channel4.com/sport/cricket/img/general/nav5_05_off.gif";  
img6off = new Image();
img6off.src = "http://www.channel4.com/sport/cricket/img/general/nav5_06_off.gif";  
img7off = new Image();
img7off.src = "http://www.channel4.com/sport/cricket/img/general/nav5_07_off.gif";  
img8off = new Image();
img8off.src = "http://www.channel4.com/sport/cricket/img/general/nav5_08_off.gif";  
img9off = new Image();
img9off.src = "http://www.channel4.com/sport/cricket/img/general/nav5_09_off.gif";  
img10off = new Image();
img10off.src = "http://www.channel4.com/sport/cricket/img/general/nav5_10_off.gif";  
  
} 
 
function imgOn(imgName) { 
        if (document.images) { 
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} 
			 
function imgOff(imgName) { 
        if (document.images) { 
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}