function returnElement(LayerName) {
	var targetElement;
	//Netscape 4
	if(document.layers) {
		targetElement = document.layers(LayerName);
	}
	//IE6
	if(document.all) {
		targetElement = document.all(LayerName) ;
	}
	//Netscape 6
	if(!document.all && document.getElementById) {
		targetElement = document.getElementById(LayerName) ;
	}
	
	return targetElement;
}






function ShowHideMenu(LayerName) {
	
	var targetElement;
	//Netscape 4
	if(document.layers) {
		targetElement = document.layers(LayerName);
	}
	//IE6
	if(document.all) {
		targetElement = document.all(LayerName) ;
	}
	//Netscape 6
	if(!document.all && document.getElementById) {
		targetElement = document.getElementById(LayerName) ;
	}
	
	if (targetElement.style.display == "none") {
		targetElement.style.display = "" ;
	} else {
		targetElement.style.display = "none" ;
	}
}


function ShowLayer(LayerName) {
	
	var targetElement;
	//Netscape 4
	if(document.layers) {
		targetElement = document.layers(LayerName);
	}
	//IE6
	if(document.all) {
		targetElement = document.all(LayerName) ;
	}
	//Netscape 6
	if(!document.all && document.getElementById) {
		targetElement = document.getElementById(LayerName) ;
	}
	
	targetElement.style.display = "block" ;

	
}


function HideLayer(LayerName) {
	
	var targetElement;
	//Netscape 4
	if(document.layers) {
		targetElement = document.layers(LayerName);
	}
	//IE6
	if(document.all) {
		targetElement = document.all(LayerName) ;
	}
	//Netscape 6
	if(!document.all && document.getElementById) {
		targetElement = document.getElementById(LayerName) ;
	}
	
	targetElement.style.display = "none" ;
	
}


function ShowHideVille(LayerVille) {
	
	HideLayer('La_Roche_Sur_Yon');
	HideLayer('Rennes');
	HideLayer('Beziers');
	HideLayer('Nantes');
	HideLayer('Paris');
	
	var targetVille = returnElement(LayerVille);
	
	
	
	if (targetVille.style.display == "none") {
		targetVille.style.display = "" ;
	} else {
		targetVille.style.display = "none" ;
	}
}



function ShowHideMap(LayerMap) {
	
	HideLayer('La_Roche_Sur_Yon');
	HideLayer('Rennes');
	HideLayer('Beziers');
	HideLayer('Nantes');
	HideLayer('Iledefrance');
	HideLayer('carte_france');
	HideLayer('carte_ile_de_france');
	
	var targetMap = returnElement(LayerMap);
	
	
	
	if (targetMap.style.display == "none") {
		targetMap.style.display = "" ;
	} else {
		targetMap.style.display = "none" ;
	}
}