function roll_over(ov_obj,over_name){
	ov_obj.src = 'images/' + over_name + '_ov.gif';
}
function roll_out(ov_obj,over_name){
	ov_obj.src = 'images/' + over_name + '.gif';
}

function roll_over2(ov_obj,over_name){
	ov_obj.src = '../images/' + over_name + '_ov.gif';
}
function roll_out2(ov_obj,over_name){
	ov_obj.src = '../images/' + over_name + '.gif';
}

function roll_over3(ov_obj,over_name){
	ov_obj.src = '../../images/' + over_name + '_ov.gif';
}
function roll_out3(ov_obj,over_name){
	ov_obj.src = '../../images/' + over_name + '.gif';
}