var flag = false;

function imageload() {  // called with onLoad()
    if (document.images) {
        menu1on = new Image(); menu1on.src = "http://www.dtfutures.com/img/gnav_home_roll.jpg";
        menu2on = new Image(); menu2on.src = "http://www.dtfutures.com/img/gnav_started_roll.jpg";
        menu3on = new Image(); menu3on.src = "http://www.dtfutures.com/img/gnav_fast_roll.jpg";
        menu4on = new Image(); menu4on.src = "http://www.dtfutures.com/img/gnav_online_roll.jpg";
		menu5on = new Image(); menu5on.src = "http://www.dtfutures.com/img/gnav_aboutdt_roll.jpg";
        menu6on = new Image(); menu6on.src = "http://www.dtfutures.com/img/gnav_contact_roll.jpg";
        menu7on = new Image(); menu7on.src = "http://www.dtfutures.com/img/gnav_request_roll.jpg";
        menu8on = new Image(); menu8on.src = "http://www.dtfutures.com/img/gnav_support_roll.jpg";
        menu9on = new Image(); menu9on.src = "http://www.dtfutures.com/img/gnav_account_roll.jpg";
        menu10on = new Image(); menu10on.src = "http://www.dtfutures.com/img/btn_startnow_roll.gif";
        menu11on = new Image(); menu11on.src = "http://www.dtfutures.com/img/btn_notsure_roll.gif";
        menu12on = new Image(); menu12on.src = "http://www.dtfutures.com/img/btn_help_roll.gif";
        menu13on = new Image(); menu13on.src = "http://www.dtfutures.com/img/btn_help_roll.gif";
		
        return (flag = true);  // set the flag and let the function know know it can work
    }
}

if (document.images) {   // load the off images 
	menu1off = new Image(); menu1off.src = "http://www.dtfutures.com/img/gnav_home_off.jpg";
	menu2off = new Image(); menu2off.src = "http://www.dtfutures.com/img/gnav_started_off.jpg";
	menu3off = new Image(); menu3off.src = "http://www.dtfutures.com/img/gnav_fast_off.jpg";
	menu4off = new Image(); menu4off.src = "http://www.dtfutures.com/img/gnav_online_off.jpg";
	menu5off = new Image(); menu5off.src = "http://www.dtfutures.com/img/gnav_aboutdt_off.jpg";
	menu6off = new Image(); menu6off.src = "http://www.dtfutures.com/img/gnav_contact_off.jpg";
	menu7off = new Image(); menu7off.src = "http://www.dtfutures.com/img/gnav_request_off.jpg";
	menu8off = new Image(); menu8off.src = "http://www.dtfutures.com/img/gnav_support_off.jpg";
	menu9off = new Image(); menu9off.src = "http://www.dtfutures.com/img/gnav_account_off.jpg";
	menu10off = new Image(); menu10off.src = "http://www.dtfutures.com/img/btn_startnow_off.gif";
	menu11off = new Image(); menu11off.src = "http://www.dtfutures.com/img/btn_notsure_off.gif";
	menu12off = new Image(); menu12off.src = "http://www.dtfutures.com/img/btn_help.gif";
	menu13off = new Image(); menu13off.src = "http://www.dtfutures.com/img/btn_help.gif";	
}

function rollin(imgName) {
    if (document.images && (flag == true)) {
        document[imgName].src = eval(imgName + "on.src");
    }
}

function rollout(imgName) {  // the normal onMouseOut function
    if (document.images){
        document[imgName].src = eval(imgName + "off.src");
    }
}