这是一个将图像向右移动以及从 .js 文件而不是直接从索引页面淡入的示例:
----------我的index.html页面----------
<!DOCTYPE html>
<html>
<body>
<script src="myJava.js"></script>
<script language="javascript" type="text/javascript">
//In pixels
var amountToMoveTotal = 1000;
var amountToMovePerStep = 10;
//In milliseconds
var timeToWaitBeforeNextIncrement = 20;
var amountToFadeTotal = 1.0;
var amountToFadePerStep = 0.01;
</script>
<p>This one moves right on hover</p>
<img onmouseover="moveRight(this, amountToMoveTotal, amountToMovePerStep, timeToWaitBeforeNextIncrement)" src="http://www.w3schools.com/jsref/smiley.gif" style="left:0px;top:50px;position:absolute;opacity:1.0;">
<br><br>
<p>This one fades in on hover</p>
<img onmouseover="fadeIn(this, amountToFadeTotal, amountToFadePerStep, timeToWaitBeforeNextIncrement)" src="http://www.w3schools.com/jsref/smiley.gif" style="left:0px;top:150px;position:absolute;opacity:0.1;">
</body>
</html>
----------我的myJava.js代码----------
var animate;
var original = null;
function moveRight(imgObj, amountToMoveTotal, amountToMovePerStep, timeToWaitBeforeNextIncrement)
{
//Copy original image location
if (original === null){
original = parseInt(imgObj.style.left);
}
//Check if the image has moved the distance requested
//If the image has not moved requested distance continue moving.
if (parseInt(imgObj.style.left) < amountToMoveTotal) {
imgObj.style.left = (parseInt(imgObj.style.left) + amountToMovePerStep) + 'px';
animate = setTimeout(function(){moveRight(imgObj, amountToMoveTotal, amountToMovePerStep, timeToWaitBeforeNextIncrement);},timeToWaitBeforeNextIncrement);
}else {
imgObj.style.left = original;
original = null;
clearTimeout(animate);
}
}
function fadeIn(imgObj, amountToFadeTotal, amountToFadePerStep, timeToWaitBeforeNextIncrement)
{
//Copy original opacity
if (original === null){
original = parseFloat(imgObj.style.opacity);
}
//Check if the image has faded the amount requested
//If the image has not faded requested amount continue fading.
if (parseFloat(imgObj.style.opacity) < amountToFadeTotal) {
imgObj.style.opacity = (parseFloat(imgObj.style.opacity) + amountToFadePerStep);
animate = setTimeout(function(){fadeIn(imgObj, amountToFadeTotal, amountToFadePerStep, timeToWaitBeforeNextIncrement);},timeToWaitBeforeNextIncrement);
}else {
imgObj.style.opacity = original;
original = null;
clearTimeout(animate);
}
}