var isNav, isIE; 	
var imgOn = new Array(6);
var imgOff = new Array(6);
var bimgOn = new Array(3);
var bimgOff = new Array(3);
var bbimgOn = new Array(2);
var bbimgOff = new Array(2);
var bbbimgOn = new Array(2);
var bbbimgOff = new Array(2);

 if (parseInt(navigator.appVersion) >= 4) { 	
   if (navigator.appName == 'Netscape') { isNav = true; } 
   else { isIE = true; }
 }
 else { 
   alert("This page includes JavaScript and can not work with old browsers. You need Netscape Navigator 4.0 (or higher) or Microsoft Internet Explorer 4.0 (or higher)") 
 }
 
if (document.images) 
{
for (i=0; i<6; i++) {
 imgOn[i] = new Image(); imgOn[i].src = "imgs/m" + eval(i) + "on.gif";
 imgOff[i] = new Image(); imgOff[i].src = "imgs/m" + eval(i) + "off.gif";
}
for (i=0; i<3; i++) {
 bimgOn[i] = new Image(); bimgOn[i].src = "imgs/bnavy/1_link" + eval(i) + "_hl_on.gif";
 bimgOff[i] = new Image(); bimgOff[i].src = "imgs/bnavy/1_link" + eval(i) + "_hl_off.gif";
}
for (i=0; i<2; i++) {
 bbimgOn[i] = new Image(); bbimgOn[i].src = "imgs/bnavy/2_link" + eval(i) + "_hl_on.gif";
 bbimgOff[i] = new Image(); bbimgOff[i].src = "imgs/bnavy/2_link" + eval(i) + "_hl_off.gif";
 bbbimgOn[i] = new Image(); bbbimgOn[i].src = "imgs/bnavy/3_link" + eval(i) + "_hl_on.gif";
 bbbimgOff[i] = new Image(); bbbimgOff[i].src = "imgs/bnavy/3_link" + eval(i) + "_hl_off.gif";
}
}

function rollOver(idx,state)
{
        if (document.images)
        if (state=="on") { eval("document [\'m" + idx + "\'].src = imgOn[" + idx + "].src"); }
	else { eval("document [\'m" + idx + "\'].src = imgOff[" + idx + "].src"); }
}

function brollOver(idx,state)
{
        if (document.images)
        if (state=="on") { eval("document [\'b" + idx + "\'].src = bimgOn[" + idx + "].src"); }
	else { eval("document [\'b" + idx + "\'].src = bimgOff[" + idx + "].src"); }
}

function bbrollOver(idx,state)
{
        if (document.images)
        if (state=="on") { eval("document [\'bb" + idx + "\'].src = bbimgOn[" + idx + "].src"); }
	else { eval("document [\'bb" + idx + "\'].src = bbimgOff[" + idx + "].src"); }
}

function bbbrollOver(idx,state)
{
        if (document.images)
        if (state=="on") { eval("document [\'bbb" + idx + "\'].src = bbbimgOn[" + idx + "].src"); }
	else { eval("document [\'bbb" + idx + "\'].src = bbbimgOff[" + idx + "].src"); }
}