function preload_menu(menu) {
	for(i = 0; i < menu.length; i++) {
		menu_object[menu[i][0] + "_false"] = new Image();
		menu_object[menu[i][0] + "_true"] = new Image();
		menu_object[menu[i][0] + "_false"].src = menu[i][1];
		menu_object[menu[i][0] + "_true"].src = menu[i][2];
	}
}

function toggle(id, state) {
	if(document.getElementById) {
		state = (state) ? "_true" : "_false";
		document.getElementById("m-" + id).src = menu_object[id + state].src;
	}
}

var menu = new Array();
var menu_object = new Array();
menu.push(Array("home", "img/m_home_false.gif", "img/m_home_true.gif"));
menu.push(Array("rondkijkers", "img/m_rondkijkers_false.gif", "img/m_rondkijkers_true.gif"));
menu.push(Array("fotografie", "img/m_fotografie_false.gif", "img/m_fotografie_true.gif"));
menu.push(Array("tarieven", "img/m_tarieven_false.gif", "img/m_tarieven_true.gif"));
menu.push(Array("contact", "img/m_contact_false.gif", "img/m_contact_true.gif"));
preload_menu(menu);