//通用获取Div
function loadDiv(div,url,fun){
	var myAjax = new Ajax.Updater(div, url, {
		method : 'get',
		parameters : null,
		onFailure : null,
		onLoading : null,
		onComplete : fun
	});
	myAjax = null;
}

//页面所有通用Div
function loadCommonDiv(){
	loadDiv('childMenuDiv','common/childMenu.htm',loadMenuDiv);
	loadDiv('topDiv', 'common/top.htm');
	loadDiv('footerDiv', 'common/footer.htm');
}
function loadMenuDiv() {
	loadDiv('menuDiv','common/menu.htm');
}