JS_常用方法_dowhileExist , addLoadEvent

常用方法_dowhileExist

//用一个函数处理一个DOM元素,如果它们都存在的话...

 

var dowhileExist = function(objID,fn){ var obj = document.getElementById(objID); (obj&&fn) && fn(obj);}

 

常用方法_addLoadEvent

//页面加载多个函数

function addLoadEvent(func){var oldonload = window.onload;if(typeof window.onload != 'function'){window.onload = func;}else {window.onload = function(){oldonload();func();}}}