<!--
browserName = navigator.appName;
browserVer = parseInt ( navigator.appVersion );
version = "n2";
if ( browserName == "Netscape" && browserVer >= 3 ) version = "n3";
if ( browserName == "Microsoft Internet Explorer" && browserVer >=4 ) version = "e4";
if ( version == "n3" || version == "e4" )
{
        pr_on = new Image ( 134, 94 );
        pr_on.src = "graph/pr2.gif";
        le_on = new Image ( 72, 69 );
        le_on.src = "graph/le2.gif";
        re_on = new Image ( 134, 70 );
        re_on.src = "graph/re2.gif";
        ko_on = new Image ( 134, 94 );
        ko_on.src = "graph/ko2.gif";
        im_on = new Image ( 134, 94 );
        im_on.src = "graph/im2.gif";
        pr_off = new Image ( 134, 94 );
        pr_off.src = "graph/pr.gif";
        le_off = new Image ( 134, 108 );
        le_off.src = "graph/le.gif";
        re_off = new Image ( 134, 70 );
        re_off.src = "graph/re.gif";
        ko_off = new Image ( 134, 94 );
        ko_off.src = "graph/ko.gif";
        im_off = new Image ( 134, 108 );
        im_off.src = "graph/im.gif";
}
function button_on ( imgName )
{
        if ( version == "n3" || version == "e4" )
        {
                butOn = eval ( imgName + "_on.src" );
                document [imgName].src = butOn;
        }
}
function button_off ( imgName )
{
        if ( version == "n3" || version == "e4" )
        {
                butOff = eval ( imgName + "_off.src" );
                document [imgName].src = butOff;
        }
}
// -->