var loader = function() {
	arbo_tb = new tool_bar();
	arbo_tb.load_ongl("Outils", "tool_tab");
	arbo_tb.load_ongl("Infos", "info_tab");
	arbo_tb.load_ongl("Utilisateurs", "user_tab");
	ws_sizer();
}

var getTop = function(elmt) {
	var elmtTop;
	if (elmt.offsetParent)
		elmtTop = elmt.offsetTop + getTop(elmt.offsetParent);
	else
		elmtTop = elmt.offsetTop;
	return (elmtTop);
}

var ws_sizer = function() {
	var ws = document.getElementById("work_space");
	ws.style.height = (window.innerHeight - getTop(ws) - 100) + 'px';
}

window.onload = loader;