function initMain() {
	var _holder = document.getElementById('nav');
	var _array = [];
	var _widthEl = 0;
	var _widthHolder = _holder.offsetWidth;
	var _len = 0;
	var _ost = 0;
	if (_holder) {
		var _block = _holder.getElementsByTagName("li")
		for (var i = 0; i < _block.length; i++ ) {
			if (_block[i].parentNode == _holder) {
				_array.push(_block[i]);
				_widthEl = _widthEl +_block[i].offsetWidth;
			}
		}
		if (_widthHolder > _widthEl) {
			_len = Math.floor((_widthHolder - _widthEl)/_array.length);
			_ost = Math.floor(_widthHolder - _widthEl - (_len*_array.length));
			for (var i = 0; i < _array.length; i++) {
				if (i == 0) {
					_array[i].style.width = ((_array[i].offsetWidth + _len +_ost ) + 'px');
				} else {
					_array[i].style.width = ((_array[i].offsetWidth + _len) + 'px');
				}
			}
		}
	}
}
if (window.addEventListener) window.addEventListener("load", initMain, false);
else if (window.attachEvent) window.attachEvent("onload", initMain);