<!-- BEGIN - payment methods hide/display elements -->
function make_vis_pmm(el_id) {
if (document.getElementById) {
	if ( el_id == "submit_section" )
	{
		var el_st_submit_section = document.getElementById("submit_section").style;
		el_st_submit_section.display = "block";
	}
	else
	{
		var el_st_ideal = document.getElementById("cart_paymm_sel_ideal").style;
		//var el_st_master = document.getElementById("cart_paymm_sel_creditcard").style;
		var el_st_prepaid = document.getElementById("cart_paymm_sel_prepaid").style;
		var el_st_submit_section = document.getElementById("submit_section").style;
	}

	//Switch off all
	el_st_ideal.display = "none";
	//el_st_master.display = "none";
	el_st_prepaid.display = "none";
	el_st_submit_section.display = "none";

	//Switch on selected
	var el_st = document.getElementById(el_id).style;
	el_st.display = "block";

	return true;
	}
}


function make_vis_by_radiobtn(el_id) {
if (document.getElementById) {
	//Switch on selected
	var el_st = document.getElementById(el_id).style;
	el_st.display = "block";

	return true;
	}
}

function make_invis_by_radiobtn(el_id) {
if (document.getElementById) {
	//Switch on selected
	var el_st = document.getElementById(el_id).style;
	el_st.display = "none";

	return true;
	}
}
<!-- END - payment methods hide/display elements -->