function largeur_fenetre()
{
 if (window.innerWidth) return window.innerWidth;
 else if (document.body && document.body.offsetWidth) return document.body.offsetWidth;
 else return 0;
}

function hauteur_fenetre()
{
 if (window.innerHeight) return window.innerHeight  ;
 else if (document.body && document.body.offsetHeight) return document.body.offsetHeight;
 else return 0;
}



// getAnchorPosition(anchorname)
//   This function returns an object having .x and .y properties which are the coordinates
//   of the named anchor, relative to the page.
function getObjectPosition(anchorname) 
{
	var object_name = new String(anchorname);

	// This function will return an Object with x and y properties
	var useWindow=false;
	var coordinates=new Object();
	var x=0,y=0;

	// Browser capability sniffing
	var use_gebi=false, use_css=false, use_layers=false;
	
	if (document.getElementById) { use_gebi=true; }
	else if (document.all) { use_css=true; }
	else if (document.layers) { use_layers=true; }


	// Logic to find position
 	if (use_gebi && document.all) {
		x=Object_getPageOffsetLeft(document.all[object_name]);
		y=Object_getPageOffsetTop(document.all[object_name]);
		}
	else if (use_gebi) {
		var o=document.getElementById(object_name);
		x=Object_getPageOffsetLeft(o);
		y=Object_getPageOffsetTop(o);
		}
 	else if (use_css) {
		x=Object_getPageOffsetLeft(document.all[object_name]);
		y=Object_getPageOffsetTop(document.all[object_name]);
		}
/*
	else if (use_layers) {
		var found=0;
		for (var i=0; i<document.anchors.length; i++) {
			if (document.anchors[i].name==object_name) { found=1; break; }
			}
		if (found==0) {
			coordinates.x=0; coordinates.y=0; return coordinates;
			}
		x=document.anchors[i].x;
		y=document.anchors[i].y;
		}
*/
	else {
		coordinates.x=0; coordinates.y=0; return coordinates;
		}
	coordinates.x=x;
	coordinates.y=y;
	return coordinates;
	}

// getObjectWindowPosition(anchorname)
//   This function returns an object having .x and .y properties which are the coordinates
//   of the named anchor, relative to the window
function getObjectWindowPosition(anchorname) {
	var coordinates=getObjectPosition(anchorname);
	var x=0;
	var y=0;
	if (document.getElementById) {
		if (isNaN(window.screenX)) {
			x=coordinates.x-document.body.scrollLeft+window.screenLeft;
			y=coordinates.y-document.body.scrollTop+window.screenTop;
			}
		else {
			x=coordinates.x+window.screenX+(window.outerWidth-window.innerWidth)-window.pageXOffset;
			y=coordinates.y+window.screenY+(window.outerHeight-24-window.innerHeight)-window.pageYOffset;
			}
		}
	else if (document.all) {
		x=coordinates.x-document.body.scrollLeft+window.screenLeft;
		y=coordinates.y-document.body.scrollTop+window.screenTop;
		}
	else if (document.layers) {
		x=coordinates.x+window.screenX+(window.outerWidth-window.innerWidth)-window.pageXOffset;
		y=coordinates.y+window.screenY+(window.outerHeight-24-window.innerHeight)-window.pageYOffset;
		}
	coordinates.x=x;
	coordinates.y=y;
	return coordinates;
	}

// Functions for IE to get position of an object
function Object_getPageOffsetLeft (el) {
	var ol=el.offsetLeft;
	while ((el=el.offsetParent) != null) { ol += parseInt(el.offsetLeft); }
	return ol;
	}
function Object_getWindowOffsetLeft (el) {
	return Object_getPageOffsetLeft(el)-document.body.scrollLeft;
	}	
function Object_getPageOffsetTop (el) {
	var ot=el.offsetTop;
	while((el=el.offsetParent) != null) { ot += el.offsetTop; }
	return ot;
	}
function Object_getWindowOffsetTop (el) {
	return Object_getPageOffsetTop(el)-document.body.scrollTop;
	}



function IsIE()
{
        var CSAg = window.navigator.userAgent;
        return CSAg.indexOf("MSIE") > 0;
}





//--------------------------------------------------------------------------




var ns4 = (document.layers)? true:false;	  //NS 4
var ie4 = (document.all)? true:false;	  //IE 4
var dom = (document.getElementById)? true:false;	  //DOM

function setToAnchor(ID_Anchor,Name_Anchor,ID_Div)
//Fonction permettant de positionner un DIV ? une position occup?e par une ancre
    {
var DivLeft = 0;	  //Position du Div par rapport au c?t? gauche de la page
var DivTop = 0;	  //Position du Div par rapport au haut de la page
    if (dom)
        {
        pos = document.getElementById(ID_Anchor);
        DivLeft = getLeft(pos);
        DivTop = getTop(pos);
        document.getElementById(ID_Div).style.left = DivLeft;
        document.getElementById(ID_Div).style.top = DivTop;
        }
    else if (ie4)
        {
        pos = document.all[ID_Anchor];
        DivLeft = getLeft(pos);
        DivTop = getTop(pos);
        document.all[ID_Div].style.posLeft = DivLeft;
        document.all[ID_Div].style.posTop = DivTop;
        }
    else if (ns4)
        {
        pos = document.anchors[Name_Anchor];
        DivLeft = pos.x;
        DivTop = pos.y;
        document.layers[ID_Div].pageX = DivLeft;
        document.layers[ID_Div].pageY = DivTop;
        }
    }


function setToPosition(ID_Div, coordinates)
//Fonction permettant de positionner un DIV ? une position occup?e par une ancre
{
    if (dom)
        {
        document.getElementById(ID_Div).style.left = coordinates.x;
        document.getElementById(ID_Div).style.top = coordinates.y;
        }
    else if (ie4)
        {
        document.all[ID_Div].style.posLeft = coordinates.x;
        document.all[ID_Div].style.posTop = coordinates.y;
        }
    else if (ns4)
        {
        document.layers[ID_Div].pageX = coordinates.x;
        document.layers[ID_Div].pageY = coordinates.y;
        }
}

function getLeft(MyObject)
//Fonction permettant de conna?tre la position d'un objet
//par rapport au bord gauche de la page.
//Cet objet peut ?tre ? l'int?rieur d'un autre objet.
    {
    if (MyObject.offsetParent)
        return (MyObject.offsetLeft + getLeft(MyObject.offsetParent));
    else
        return (MyObject.offsetLeft);
    }
function getTop(MyObject)
//Fonction permettant de conna?tre la position d'un objet
//par rapport au bord haut de la page.
//Cet objet peut ?tre ? l'int?rieur d'un autre objet.
    {
    if (MyObject.offsetParent)
        return (MyObject.offsetTop + getTop(MyObject.offsetParent));
    else
        return (MyObject.offsetTop);
    }