var isDOM = (document.getElementById ? true : false); 
var isIE4 = ((document.all && !isDOM) ? true : false);
var isNS4 = (document.layers ? true : false);
function getRef(id) {
if (isDOM) return document.getElementById(id);
if (isIE4) return document.all[id];
if (isNS4) return document.layers[id];
}
function getSty(id) {
return (isNS4 ? getRef(id) : getRef(id).style);
} 

var popTimer = 0;
var litNow = new Array();
function popOver(menuNum, itemNum) {
clearTimeout(popTimer);
hideAllBut(menuNum);
litNow = getTree(menuNum, itemNum);
changeCol(litNow, true);
targetNum = menu[menuNum][itemNum].target;
if (targetNum > 0) {
thisX = parseInt(menu[menuNum][0].ref.left) + parseInt(menu[menuNum][itemNum].ref.left);
thisY = parseInt(menu[menuNum][0].ref.top) + parseInt(menu[menuNum][itemNum].ref.top);
with (menu[targetNum][0].ref) {
left = parseInt(thisX + menu[targetNum][0].x);
top = parseInt(thisY + menu[targetNum][0].y);
visibility = 'visible';
      }
   }
}
function popOut(menuNum, itemNum) {
if ((menuNum == 0) && !menu[menuNum][itemNum].target)
hideAllBut(0)
else
popTimer = setTimeout('hideAllBut(0)', 500);
}
function getTree(menuNum, itemNum) {
itemArray = new Array(menu.length);
while(1) {
itemArray[menuNum] = itemNum;
if (menuNum == 0) return itemArray;
itemNum = menu[menuNum][0].parentItem;
menuNum = menu[menuNum][0].parentMenu;
   }
}

function changeCol(changeArray, isOver) {
for (menuCount = 0; menuCount < changeArray.length; menuCount++) {
if (changeArray[menuCount]) {
newCol = isOver ? menu[menuCount][0].overCol : menu[menuCount][0].backCol;
with (menu[menuCount][changeArray[menuCount]].ref) {
if (isNS4) bgColor = newCol;
else backgroundColor = newCol;
         }
      }
   }
}
function hideAllBut(menuNum) {
var keepMenus = getTree(menuNum, 1);
for (count = 0; count < menu.length; count++)
if (!keepMenus[count])
menu[count][0].ref.visibility = 'hidden';
changeCol(litNow, false);
}

function Menu(isVert, popInd, x, y, width, overCol, backCol, borderClass, textClass) {
this.isVert = isVert;
this.popInd = popInd
this.x = x;
this.y = y;
this.width = width;
this.overCol = overCol;
this.backCol = backCol;
this.borderClass = borderClass;
this.textClass = textClass;
this.parentMenu = null;
this.parentItem = null;
this.ref = null;
}

function Item(text, href, frame, length, spacing, target) {
this.text = text;
this.href = href;
this.frame = frame;
this.length = length;
this.spacing = spacing;
this.target = target;
this.ref = null;
}

function writeMenus() {
if (!isDOM && !isIE4 && !isNS4) return;

for (currMenu = 0; currMenu < menu.length; currMenu++) with (menu[currMenu][0]) {
var str = '', itemX = 0, itemY = 0;
for (currItem = 1; currItem < menu[currMenu].length; currItem++) with (menu[currMenu][currItem]) {
var itemID = 'menu' + currMenu + 'item' + currItem;
var w = (isVert ? width : length);
var h = (isVert ? length : width);
if (isDOM || isIE4) {
str += '<div id="' + itemID + '" style="position: absolute; left: ' + itemX + '; top: ' + itemY + '; width: ' + w + '; height: ' + h + '; visibility: inherit; ';
if (backCol) str += 'background: ' + backCol + '; ';
str += '" ';
}
if (isNS4) {
str += '<layer id="' + itemID + '" left="' + itemX + '" top="' + itemY + '" width="' +  w + '" height="' + h + '" visibility="inherit" ';
if (backCol) str += 'bgcolor="' + backCol + '" ';
}
if (borderClass) str += 'class="' + borderClass + '" ';

str += 'onMouseOver="popOver(' + currMenu + ',' + currItem + ')" onMouseOut="popOut(' + currMenu + ',' + currItem + ')">';

str += '<table width="' + (w - 8) + '" border="0" cellspacing="0" cellpadding="' + (!isNS4 && borderClass ? 3 : 0) + '"><tr><td width=1 nowrap></td><td align="left" height="' + (h - 7) + '">' + (href ?  '<a class="' + textClass + '" href="' + href + '"' + (frame ? ' target="' + frame + '">' : '>') + text + '</a></td>' :  '<a class="' + textClass + '">' + text + '</a></td>');
if (target > 0) {

menu[target][0].parentMenu = currMenu;
menu[target][0].parentItem = currItem;

if (popInd) str += '<td class="' + textClass + '" align="right">' + popInd + '</td>';
}
str += '</tr></table>' + (isNS4 ? '</layer>' : '</div>');
if (isVert) itemY += length + spacing;
else itemX += length + spacing;
}
if (isDOM) {
var newDiv = document.createElement('div');
document.getElementsByTagName('body').item(0).appendChild(newDiv);
newDiv.innerHTML = str;
ref = newDiv.style;
ref.position = 'absolute';
ref.visibility = 'hidden';
}

if (isIE4) {
document.body.insertAdjacentHTML('beforeEnd', '<div id="menu' + currMenu + 'div" ' + 'style="position: absolute; visibility: hidden">' + str + '</div>');
ref = getSty('menu' + currMenu + 'div');
}

if (isNS4) {
ref = new Layer(0);
ref.document.write(str);
ref.document.close();
}

for (currItem = 1; currItem < menu[currMenu].length; currItem++) {
itemName = 'menu' + currMenu + 'item' + currItem;
if (isDOM || isIE4) menu[currMenu][currItem].ref = getSty(itemName);
if (isNS4) menu[currMenu][currItem].ref = ref.document[itemName];
   }
}
with(menu[0][0]) {
ref.left = x;
ref.top = y;
ref.visibility = 'visible';
   }
}


var menu = new Array();
menu[0]=new Array();
menu[0][0]=new Menu(false,' ',0,0,20,'#646464','#828282','itemunBorder','itemunText');

menu[0][1]=new Item('Autres plans','','_self',107, 0, 1);
menu[1]=new Array();
menu[1][0]=new Menu(true, '>', 0 ,20 ,107, '#505050', '#646464', 'itemBorder', 'itemText');
menu[1][1]=new Item('Carte enceinte','carte_enceintes.htm','_self',20, 0, 0);
menu[1][2]=new Item('Photo satellite','satellite.htm','_self',20, 0, 0);
menu[1][3]=new Item('Plan en 1000','plan_1000.htm','_self',20, 0, 0);
menu[1][4]=new Item('Plan en 1000','plan_cochet.htm','_self',20, 0, 0);
menu[1][5]=new Item('Vue de 1561','plan_1561.htm','_self',20, 0, 0);
menu[1][6]=new Item('Plan en 1575','plan_1575.htm','_self',20, 0, 0);
menu[1][7]=new Item('Plan en 1616','plan_1616.htm','_self',20, 0, 0);
menu[1][8]=new Item('Plan en 1625','plan_1625.htm','_self',20, 0, 0);
menu[1][9]=new Item('Plan en 1655','plan_1655.htm','_self',20, 0, 0);
menu[1][10]=new Item('Plan en 1656','plan_1656.htm','_self',20, 0, 0);
menu[1][11]=new Item('Plan au 18°','plan_18.htm','_self',20, 0, 0);
menu[1][12]=new Item('Plan en 1709','plan_1709.htm','_self',20, 0, 0);
menu[1][13]=new Item('Plan en 1730','plan_1730.htm','_self',20, 0, 0);
menu[1][14]=new Item('Plan en 1750','plan_1750.htm','_self',20, 0, 0);
menu[1][15]=new Item('Plan en 1756','carte_cassini.htm','_self',20, 0, 0);
menu[1][16]=new Item('Plan 1764','plan_1764.htm','_self',20, 0, 0);
menu[1][17]=new Item('Plan 1791','plan_1791.htm','_self',20, 0, 0);
menu[1][18]=new Item('Plan fin 18°','plan_fin_18.htm','_self',20, 0, 0);
menu[1][19]=new Item('Plan en 1819','plan_1819.htm','_self',20, 0, 0);
menu[1][20]=new Item('Plan en 1847','plan_1847.htm','_self',20, 0, 0);
menu[1][21]=new Item('Plan vers 1880','plan_1880.htm','_self',20, 0, 0);
menu[1][22]=new Item('Plan en 1920','plan_1920.htm','_self',20, 0, 0);
menu[1][23]=new Item('Plan 1936 (rg)','plan_rg_1936.htm','_self',20, 0, 0);
menu[1][24]=new Item('Plan en 2001','plan_2001.htm','_self',20, 0, 0);
menu[1][25]=new Item('Plan en 2006','carte_google_maps.htm','_self',20, 0, 0);
menu[1][26]=new Item('Population','population.htm','_self',20, 0, 0);
menu[1][27]=new Item('Agglomération','plan_agglo_rouen.htm','_self',20, 0, 0);
menu[1][28]=new Item('Environs de Rouen 2003','carte_michelin.htm','_self',20, 0, 0);