function init () {
	image1 = new Image(); image1.src = "/web/images/leftmenu/hr1.gif";
	image2 = new Image(); image2.src = "/web/images/leftmenu/hr2.gif";
	image3 = new Image(); image3.src = "/web/images/leftmenu/hr3.gif";
	image4 = new Image(); image4.src = "/web/images/leftmenu/hr4.gif";
	image5 = new Image(); image5.src = "/web/images/leftmenu/hr5.gif";
	image6 = new Image(); image6.src = "/web/images/leftmenu/hr6.gif";
	image7 = new Image(); image7.src = "/web/images/leftmenu/hr7.gif";
	image8 = new Image(); image8.src = "/web/images/leftmenu/hr8.gif";
}

function show_btn(x) {
	top.document.getElementById('leftmenu_space').style.backgroundImage="url(/web/images/leftmenu/hr"+x+".gif)";
}

function hide_btn(x) {
	top.document.getElementById('leftmenu_space').style.backgroundImage='none';
}