function checkbox_img_toggle ( id )
{
	var chkbox_id = 'checked_uid_'+id;
	var chkbox_img_id = 'checkbox_img_'+id;

	document.getElementById(chkbox_img_id).src=document.getElementById(chkbox_id).checked ? 'gfx/checkbox_ok.png' : 'gfx/checkbox.png';
}

function checkbox_toggle ( id )
{
	var id = id;
	var chkbox_id = 'checked_uid_'+id;
	var chkbox_img_id = 'checkbox_img_'+id;

	document.getElementById(chkbox_id).checked = document.getElementById(chkbox_id).checked ? false : true;

	checkbox_img_toggle ( id );
}