var agent = navigator.userAgent.toLowerCase();
var navIE= ((agent.indexOf('msie') != -1) && (agent.indexOf('opera') == -1) && (agent.indexOf('webtv') == -1)); 
function init_menu(){var arr_li = document.getElementById('menu').getElementsByTagName('li');for ( var i=0;  i<arr_li.length;  i++ ){ajoutEvt(arr_li.item(i),'mouseover',afficher);ajoutEvt(arr_li.item(i),'mouseout',cacher);ajoutEvt(arr_li.item(i),'blur',cacher);ajoutEvt(arr_li.item(i),'focus',afficher);arr_li.item(i).setAttribute( 'id', "li"+i );}}
function afficher(){var lesul = this.getElementsByTagName('ul');if(lesul.length >0){lesul.item(0).style.visibility = 'visible';lesul.item(0).style.zIndex = 3;}}
function cacher(){var lesul = this.getElementsByTagName('ul');if(lesul.length >0){lesul.item(0).style.zIndex = 2;document.getElementById(this.id).getElementsByTagName('ul')[0].style.visibility = 'hidden';}}
function ajoutEvt( target, eventName, functionName ){if(navIE){eval('target.on'+eventName+'=functionName');}else{target.addEventListener( eventName , functionName , true ); }}