[jQuery] IE problem with each function

[Zhx]

here is my code, it works fine in FF, but in IE, the "index" message
did not popup. Anyone could give me a suggestion to figure out this?
   jQuery("#demoform dt").each(function(index,domEle){
        if (jQuery(domEle).text() == "ISSN:")
         {
                 alert(index);
                 exit;
         }
    })