function defini_menus() {
    
    var m;
    var c;
    var dd;
    c = 1;
    
    while( m = document.getElementById( "menu" + c ) ) {
        if( document.all == undefined ) { // pour mozilla uniquement
            //m.style = ''; // desactive le style dynamique car javascript s'en occupe
            //m.setAttribute("style", ";");
        }
        else { // pour IE
            m.onmouseover = new Function ( "","var dd;this.style.backgroundColor = '#ffc';dd = document.getElementById( 'smenu" + c + "' );if( dd ) { dd.style.display = 'block'; } " );
            m.onmouseout = new Function ( "","var dd;this.style.backgroundColor = 'transparent';dd = document.getElementById( 'smenu" + c + "' );if( dd ) { dd.style.display = 'none'; }" );
            var listLi;
            var ch = '';
            listLi = m.getElementsByTagName( 'li' );
            for( var i = 0; i < listLi.length; i++ ){
                ch += listLi[i].innerHTML;
                listLi[i].onmouseover = new Function( "","this.style.backgroundColor = '#ffc';" ); //this.style.backgroundColor = 'blue'
                listLi[i].onmouseout = new Function( "","this.style.backgroundColor = '#fc6';" ); //this.style.backgroundColor = 'blue'
            }
            //alert( ch );
        }
        c++;
    }
    
}