// Déclaration des variables

var isNav, isIE
var offsetX, offsetY
var selectedObj

// Affectation des valeurs

var enlargefactor=5

var largewidth = 455
var largeheight = 523
var largeleft = 250
var largetop = 30

var mapwidth = Math.floor(largewidth/enlargefactor)
var mapheight = Math.floor(largeheight/enlargefactor)
var mapleft = 50
var maptop = 30

var searchwidth = 32
var searchheight = 32
var searchleft = 470
var searchtop = 218

var difleft= largeleft-mapleft
var diftop= largetop-maptop

var clippoints

var cliptop = (mapheight-searchheight)*enlargefactor
var clipbottom = cliptop+(searchheight*enlargefactor)
var clipleft =(mapwidth-searchwidth)*enlargefactor
var clipright = clipleft+(searchwidth*enlargefactor)


if (parseInt(navigator.appVersion) >= 4) {
	if (navigator.appName == "Netscape") {
		isNav = true
	} else {
		isIE = true
	}
}

function setZIndex(obj, zOrder) {
	obj.zIndex = zOrder
}

function shiftTo(obj, x, y) {
	if (isNav) {
		obj.moveTo(x,y)
	} else {
		obj.pixelLeft = x
		obj.pixelTop = y
	}
	cliptop = (y-maptop)*enlargefactor
	clipbottom = cliptop+(searchheight*enlargefactor)
	clipleft = (x-mapleft)*enlargefactor
	clipright = clipleft+(searchwidth*enlargefactor)

	if (document.layers) {
		document.large.top=largetop-cliptop
		document.large.left=largeleft-clipleft
		document.large.clip.left = clipleft
		document.large.clip.right = clipright
		document.large.clip.top = cliptop
		document.large.clip.bottom = clipbottom
	}
}

function setSelectedElem(evt) {
	if (isNav) {
		var testObj
		var clickX = evt.pageX
		var clickY = evt.pageY
		for (var i = document.layers.length - 1; i >= 0; i--) {
			testObj = document.layers[i]
			if ((clickX > testObj.left) &&
				(clickX < testObj.left + testObj.clip.width) &&
				(clickY > testObj.top) &&
				(clickY < testObj.top + testObj.clip.height)) {
					selectedObj = testObj
					setZIndex(selectedObj, 100)
					return
			}
		}
	} else {
		var imgObj = window.event.srcElement
		if (imgObj.parentElement.id.indexOf("search") != -1) {
			selectedObj = imgObj.parentElement.style
			setZIndex(selectedObj,100)
			return
		}
	}
	selectedObj = null
	return
}
function dragIt(evt) {
	if (selectedObj) {
		if (isNav) {
			shiftTo(selectedObj, (evt.pageX - offsetX), (evt.pageY - offsetY))
		} else {
            document.form1.xy.value = eval(window.event.clientX - offsetX - mapleft) + ';' + eval(window.event.clientY - offsetY - maptop);
            shiftTo(selectedObj, (window.event.clientX - offsetX), (window.event.clientY - offsetY))
			return false
		}
	}
}
function engage(evt) {
	setSelectedElem(evt)
	if (selectedObj) {
		if (isNav) {
			offsetX = evt.pageX - selectedObj.left
			offsetY = evt.pageY - selectedObj.top
		} else {
			offsetX = window.event.offsetX
			offsetY = window.event.offsetY
		}
	}
	return false
}
// Désactive l'activation du drag & drop
function release(evt) {
	if (selectedObj) {
		setZIndex(selectedObj, 0)
		selectedObj = null
	}
}
// Capture la position de la souris
function setNavEventCapture() {
	if (isNav) {
		document.captureEvents(Event.MOUSEDOWN | Event.MOUSEMOVE | Event.MOUSEUP)
	}
}
function checkPos ()
	{
	(evt.pageX - offsetX);
	(evt.pageY - offsetY);
	}
// Initialisation des layers
function init() {
	if (document.layers) {
		document.map.left=mapleft
		document.map.top=maptop
		document.search.left=searchleft
		document.search.top=searchtop
			setNavEventCapture()
	}
	if (document.all) {
		document.all.map.style.posLeft=mapleft
		document.all.map.style.posTop=maptop
		document.all.search.style.posLeft=searchleft
		document.all.search.style.posTop=searchtop
	}
// Associe les fonctions aux évenements
	document.onmousedown = engage
	document.onmousemove = dragIt
	document.onmouseup = release
}