function toggleDisplayImageDoc4(numImage, nbImage){
    toggleDisplay('image' + numImage);
    for (var i=1; i<nbImage+1; i++) {  	
    	if ((numImage != i) && (document.getElementById('image' + i))) {
    		toggleHide('image' + i);
    	}
    }
}	
function toggleDisplay(zone){
	var lyr = document.getElementById(zone);
	if(lyr.style.display=='none'){
		lyr.style.display='inline';
	}
}

function toggleHide(zone){
	var lyr = document.getElementById(zone);
	if(lyr.style.display=='inline'){
		lyr.style.display='none';
	}
}

function addLoadEvent(func)
{
    if (window.addEventListener)
    {
        window.addEventListener("load", func, false);
    }
    else if (window.attachEvent)
    {
        window.attachEvent("onload", func);
    }
}