<!--

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    a1 = new Image; a1.src = "../bt01_off.gif";
    a11 = new Image; a11.src = "../bt01_on.gif";


    a2 = new Image; a2.src = "../bt02_off.gif";           
    a21 = new Image; a21.src = "../bt02_on.gif";


    a3 = new Image; a3.src = "../bt03_off.gif";
    a31 = new Image; a31.src = "../bt03_on.gif";

		
    a4 = new Image; a4.src = "../bt04_off.gif";           
    a41 = new Image; a41.src = "../bt04_on.gif";

	 } 



    function imgactivo(imgName) {
            if (document.images) {
                document[imgName].src = eval(imgName + "2.src");
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	function imgover(imgName) {
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                document[imgName].src = eval(imgName + "1.src");
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	 function imgdown(imgName) {
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                document[imgName].src = eval(imgName + "12.src");
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    }

    function imgoff(imgName) {
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                document[imgName].src = eval(imgName + ".src");
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// -->