function setLayer() {
	var calque = document.getElementById("cache");
    if (calque != null) {
	    calque.style.top = document.documentElement.scrollTop +'px';
    }
}

function displayLayer(layer,display) {
	var calque = document.getElementById("cache");
	var calque_function = document.getElementById(layer);
    if (calque != null) {
	    calque.style.top = document.documentElement.scrollTop +'px';
	    if(display == true){
		    calque.style.display='block';
		    calque_function.style.display='block';
	    }
	    else {
		    calque.style.display='none';
		    calque_function.style.display='none';
	    }
    }
}
window.onload = function() {
        setLayer();
}
window.onresize = function() {
        setLayer();
}
window.onscroll = function() {
        setLayer();
}

function securit(page)
{
	if(confirm('Do you want to delete this page ?'))
	document.location.href = page;
}


function affichage_popup(nom_de_la_page, nom_interne_de_la_fenetre)
{
window.open (nom_de_la_page, nom_interne_de_la_fenetre, config='height=600, width=670, toolbar=no, menubar=no, scrollbars=no, resizable=no, location=no, directories=no, status=no')
}