function addLoadEvent(func){//預加載添加多條指令函數	var oldonload = window.onload;	if(typeof window.onload != 'function'){		window.onload = func;	}else{		window.onload = function(){			oldonload();			func();		}	}}
function insertAfter(newElement,targetElement){//在一個節點之后插入一個新的節點	var parent = targetElement.parentNode;	if(parent.lastChild == targetElement){		parent.appendChild(newElement);	}else{		parent.insertBefore(newElement,targetElement.nextSibling);	}}