Question

我已经做到这一点，当你将光标悬停在图像按钮上时，它会开始淡出，当你移出光标时，它会回到原始的不透明度。问题是，当我在正文中的内容周围添加php标签并回显表时，它不再有效。感谢您提前寻求帮助。

以下是代码：

<html>
<head>
<script type="text/javascript">
function SetOpacity(elem, opacityAsInt)
{
    var opacityAsDecimal = opacityAsInt;

    if (opacityAsInt > 100)
        opacityAsInt = opacityAsDecimal = 100; 
    else if (opacityAsInt < 0)
        opacityAsInt = opacityAsDecimal = 0; 

    opacityAsDecimal /= 100;
    if (opacityAsInt < 1)
        opacityAsInt = 1; // IE7 bug, text smoothing cuts out if 0

    elem.style.opacity = opacityAsDecimal;
    elem.style.filter  = "alpha(opacity=" + opacityAsInt + ")";
}

function FadeOpacity(elemId, fromOpacity, toOpacity, time, fps)
{
    var steps = Math.ceil(fps * (time / 1000));
    var delta = (toOpacity - fromOpacity) / steps;

    FadeOpacityStep(elemId, 0, steps, fromOpacity, delta, (time / steps));
}

function FadeOpacityStep(elemId, stepNum, steps, fromOpacity, delta, timePerStep)
{
    SetOpacity(document.getElementById(elemId), Math.round(parseInt(fromOpacity) + (delta * stepNum)));

    if (stepNum < steps)
        setTimeout("FadeOpacityStep('" + elemId + "', " + (stepNum+1) + ", " + steps + ", " + fromOpacity + ", " + delta + ", " + timePerStep + ");", timePerStep);
}

</script>
</head>


<body>
<?php

echo"
<form action='opacity.php' method='post'>

<input type='image' name='blue' id='ImgAkxl2' value='blue' src='streetfighter.jpg'
onmouseover='FadeOpacity('ImgAkxl2', 100, 70, 250 , 24)'
onmouseout ='FadeOpacity('ImgAkxl2', 70, 100, 250 , 24)'



/>
</form>


";

?>
</body>
</html>

Answer 1

您需要在onmouseover和onmouseout事件中转义内部引号

<input type='image' name='blue' id='ImgAkxl2' value='blue' src='streetfighter.jpg'
onmouseover='FadeOpacity(\'ImgAkxl2\', 100, 70, 250 , 24)'
onmouseout ='FadeOpacity(\'ImgAkxl2\', 70, 100, 250 , 24)'
/>

Answer 2

onmouseover='FadeOpacity('ImgAkxl2', 100, 70, 250 , 24)'
onmouseout ='FadeOpacity('ImgAkxl2', 70, 100, 250 , 24)'

变为

onmouseover='FadeOpacity(\"ImgAkxl2\", 100, 70, 250 , 24)'
onmouseout ='FadeOpacity(\"ImgAkxl2\", 70, 100, 250 , 24)'

你的问题解决了！：）

在属性的值中使用相同类型的引用关闭值的部分，如果这有意义吗？

从php echo调用javascript图像不透明度函数

2 个答案: