function thisMovie(movieName){if(navigator.appName.indexOf("Microsoft")!=-1){return window[movieName];}else{return document[movieName];}}
function enlargeDiv(arg){var p=thisMovie('menu_cos');var obj=document.getElementById('mainnav');obj.style.height=arg+'px';p.height=arg;}
function minimizeDiv(){var obj=document.getElementById('mainnav');obj.style.height='43'+'px';var p=thisMovie('menu_cos');if(p)p.height=43;}