function toggleDisplayImageDoc(numImage, nbImage , clear){
    toggleDisplay('image' + numImage);
    for (var i=1; i<nbImage+1; i++) {  	
    	if ((numImage != i) && (document.getElementById('image' + i))) {
    		toggleHide('image' + i);
    	}
    }
	//alert(clear);
	if ( clear == true ){ // si on navique le slideshow
	 clearInterval(slideshow_auto);
	}	
}

function slider(numImage, nbImage , clear){
    toggleDisplay('images' + numImage);
    for (var i=1; i<nbImage+1; i++) {  	
    	if ((numImage != i) && (document.getElementById('images' + i))) {
    		toggleHide('images' + i);
    	}
    }
	//alert(clear);
	if ( clear == true ){ // si on navique le slideshow
	 clearInterval(slideshow_auto);
	}	
}





	
function toggleDisplay(image){
	var lyr = document.getElementById(image);
	if(lyr.style.display=='none'){
		lyr.style.display='block';
	}
}
function toggleHide(image){
	var lyr = document.getElementById(image);
	if(lyr.style.display=='block'){
		lyr.style.display='none';
	}
}