var menus = new Array();

function start() {if ( document.getElementById ) {
menus[1] = 'dealer';
menus[2] = 'equipment';
menus[3] = 'parts';

for ( i = 1; i < menus.length; i++ ) {
  var str = "droplink" + i;
  var obj = document.getElementById(str);
  obj.href = "javascript:showhide('" + i + "')"; 
}
}
}

function showhide(d) {
var str = "droplink" + d;
var obj = document.getElementById(str);
if(document.getElementById(menus[d]).style.display == "none") { 
        obj.getElementsByTagName('div')[0].className = "arrowout";
        document.getElementById(menus[d]).style.display = "block"; 
}
else { 
        obj.getElementsByTagName('div')[0].className = "arrowdown";
        document.getElementById(menus[d]).style.display = "none"; }
}

window.onload = start;