function hover_show(source,target) {
   $(source).onmouseover= function() {
      $(target).show();
   };
   $(source).onmouseout= function() {
       $(target).hide();
   };
}

var second_pass_where = null;
var second_pass_what = null;
var second_pass_action = null;

function second_pass(alterMe,loadMe) {
   second_pass_where = alterMe;
   second_pass_what = loadMe;
}

function second_pass_load() {
    if(second_pass_where==null) return;
    new Ajax.Updater( 
       second_pass_where, 
       second_pass_what,
       {synchronous:true,evalScripts:true,method:'get'}
    );
}