isNetscape = (navigator.appName.indexOf("Netscape") >= 0);
isExplorer = (navigator.appName.indexOf("Explorer") >= 0);
roll_supported = (parseInt(navigator.appVersion) >= 3 && (isExplorer || isNetscape));
active_menu = 0;

function over(img) {
	if (roll_supported) {
		document.images[img].src = "images/proposal_" + img + "_on.gif";
	}
}

function out(img) {
	if (roll_supported) {
		document.images[img].src = "images/proposal_" + img + ".gif";
	}
}

function preload_all() {
	preload("images/proposal_m1_on.gif");
	preload("images/proposal_m2_on.gif");
	preload("images/proposal_m3_on.gif");
	preload("images/proposal_m4_on.gif");
	preload("images/proposal_m5_on.gif");
	preload("images/proposal_p1_on.gif");
	preload("images/proposal_p2_on.gif");
	preload("images/proposal_p3_on.gif");
	preload("images/proposal_p4_on.gif");
	preload("images/proposal_p5_on.gif");
	preload("images/proposal_p6_on.gif");
}

function preload(img) {
	load = new Image;
	load.src = img;
}

preload_all();