positionmessage.js

综合JavaScript和CSS实现一个小球的自由落体运动

// JavaScript Document
function positionMessage(){
	if(!document.getElementById)
	return false;
	if(!document.getElementById("image"))
	return false;
	var elem=document.getElementById("image");
	elem.style.position="absolute";
	elem.style.left="50px";
	elem.style.top="100px";
	freedown();
}
addLoadEvent(positionMessage);