function navi_border() {
	var nav = document.getElementById("sub_navi2").getElementsByTagName("a");
	var sum = 0;

	for(var i=0; i<nav.length; i++) {
		sum = sum + i;
	}

	if(sum == 1) {
		var firstNav = nav[0];
		if(firstNav != null) {
			firstNav.style.border="none";
		}
	}
}

if (window.attachEvent){
	window.attachEvent("onload", navi_border);
}
else {
	window.addEventListener("load", navi_border, false);
}