if (document.images) {         
	img1on = new Image();      
	img1on.src = "navem/i/ic1_on.gif";
	
	img2on = new Image();      
	img2on.src = "navem/i/ic2_on.gif";
	
	img3on = new Image();      
	img3on.src = "navem/i/ic3_on.gif";
	
	img4on = new Image();      
	img4on.src = "navem/i/ic4_on.gif";
	
	img5on = new Image();      
	img5on.src = "navem/i/ic5_on.gif";
	
	img6on = new Image();
	img6on.src = "navem/i/ic6_on.gif";
	
	img1off = new Image(); 
	img1off.src = "navem/i/ic1_off.gif"; 
	
	img2off = new Image(); 
	img2off.src = "navem/i/ic2_off.gif"; 
	
	img3off = new Image(); 
	img3off.src = "navem/i/ic3_off.gif"; 
	
	img4off = new Image(); 
	img4off.src = "navem/i/ic4_off.gif"; 
	
	img5off = new Image(); 
	img5off.src = "navem/i/ic5_off.gif"; 
	
	img6off = new Image();
	img6off.src = "navem/i/ic6_off.gif";
}


function imgOn(imgName) {
	if (document.images) {
	    document[imgName].src = eval(imgName + "on.src");
	}
}


function imgOff(imgName) {
	if (document.images) {
	    document[imgName].src = eval(imgName + "off.src");
	}
}