//body 導航，當鼠標在上發生行為時，若為指定對象則返回該真，否則為假function body_share(str) {	var flag = false;	switch (str) {	  case "body_config":	  case "body_human":	  case "body_change":	  case "body_salary":	  case "body_engage":	  case "body_report":		flag = true;		break;	  default:		break;	}	return flag;}//body 導航鼠標移動事件function body_move(e) {	var element = event.srcElement;	if (body_share(element.name)) {		//改變導航按鈕的切換顯示		var src = element.src;		var fix = src.split(".")[1];		if ("gif" == fix) {			element.src = src.replace(/gif$/, "jpg");		}		//鼠標移出時，將之前的圖片還原		element.onmouseout = function () {			element.src = src;		};	}}//body 導航鼠標點擊事件function body_click(e) {	var element = event.srcElement;	var str = element.name;	if (body_share(str)) {		//改變導航按鈕的切換顯示		element.onmouseout = function () {		};		var all_img = e.getElementsByTagName("img");		for (var i = 0; i < all_img.length; i++) {			var img = all_img[i];			if (img != element) {				img.src = img.src.replace(/jpg$/, "gif");			}		}		change_load(str);//改變子主頁的切換顯示	}}//頁面加載時調用的方法，用來顯示當前所選中的項function body_load(str) {	change_load(str);//改變子主頁的切換顯示	//改變頂部導航顯示	var img = document.getElementById("body_div").childNodes;	for (var i in img) {		var imgname = img[i].name;		if (body_share(imgname)) {			if (str != imgname) {				img[i].src = img[i].src.replace(/jpg$/, "gif");			} else {				img[i].src = img[i].src.replace(/gif$/, "jpg");			}		}	}}//改變主頁主體的顯示function change_load(str) {	var all_div = document.getElementById("body_main").childNodes;	for (var i = 0; i < all_div.length; i++) {		var div = all_div[i];		if (div.id != str) {			div.style.display = "none";		} else {			div.style.display = "block";		}	}}