我从来没有想过chrome浏览器会让我伤心，但是我们新网站的幻灯片在某些版本的chrome浏览器中无法正常运行。
错误出现在这里:
"mainPicture.src = '''.$directory.$current_pic.'''; setMarkerPos('.$i.')"
声称我不能修改mainPicture，一个不存在的id。显然，其他浏览器看到这个对象没有问题。
非常感谢所有的帮助!
.
你可以在这里找到该页。
源代码:<?php
/********************************************************************
* GATHER IMAGES FROM IMAGE DIRECTORY *
********************************************************************/
// Define directory where images are stored
$directory = "../../images/slideshow/";
// Create blank array to store image names
$pic_array = array("");
$num_pics;
// Create number to define position of images in array
$counter = 0;
// Gather pictures from image directory
if(is_dir($directory))
{
// Open directory to view files
if($dh = opendir($directory))
{
// Continue while still files to view
while(($file = readdir($dh)) !== false)
{
// Stop if picture limit of 6 reached
if($counter == 6)
break;
// Gather if object found is file or directory
$file_check = filetype($directory.$file);
// If object is a file, add it to the slideshow
if ($file_check == "file")
{
$extension = substr($file, strpos($file, "."));
if ($extension == ".png" || $extension == ".jpg")
{
$pic_array[$counter] = $file;
$counter++;
}
}
}
}
}
// Determine number of pics gathered
$num_pics = count($pic_array);
?>
<html>
<head>
<link href="scripts/slideshow.css" rel="stylesheet" type="text/css">
<?php
/********************************************************************
* CONTROL BEHAVIORS OF SLIDESHOW *
********************************************************************/
?>
<!-- Begin script to control slideshow -->
<script type = "text/javascript">
var thumbTop = 450; // starting value of thumb.style.top (make sure multiple of increment)
var highestTop = 342; // highest point mask can be on screen ,-, (make sure multiple of increment)
var lowestTop = 450; // lowest point mask can be on screen ,_, (make sure multiple of increment)
var delay = 2; // speed in which slide up and down methods are called
var increment = 5; // value that thumbTop increments with each method call
var intervalUp; // interval for thumb upward movements
var intervalDown; // interval for thumb downward movements
function startThumbSlideUp()
{
window.clearInterval(intervalDown);
intervalUp = window.setInterval(thumbSlideUp,delay);
}
function startThumbSlideDown()
{
window.clearInterval(intervalUp);
intervalDown = window.setInterval(thumbSlideDown,delay);
}
function thumbSlideUp()
{
thumbTop -= increment;
if (thumbTop <= highestTop)
{
thumbTop = highestTop;
window.clearInterval(intervalUp);
}
else
thumbMask.style.top = thumbTop;
}
function thumbSlideDown()
{
// Added to fix issue where images would start from too large a height
if (thumbTop <= highestTop)
thumbTop = highestTop;
thumbTop += increment;
if (thumbTop >= lowestTop)
{
thumbTop = lowestTop;
window.clearInterval(intervalDown);
}
else
thumbMask.style.top = thumbTop;
}
// Move marker above image <pos>
function setMarkerPos(pos)
{
marker.style.left = 600 - (66 * (pos)) + 19;
}
</script>
</head>
<?php
/********************************************************************
* DISPLAY SLIDESHOW *
********************************************************************/
// Start body and make images unhighlightable
echo '<body onselectstart="return false" style="margin: 0px;">';
// Create base value to increment horizontal position of thumbnails
$curr_thumb_left = 595; // (ignore this comment) 660<width of image> - 66<width of thumb> - 10<space between side> // 660
// Create and display main (large) image and image thumbnails
echo '<div id="mask" onmouseout = "startThumbSlideDown()" onmouseover = "startThumbSlideUp();">
';
echo '<img src = "'.$directory.$pic_array[0].'" id = "mainPicture" height = "420" width = "660" style = "z-index: -1; position:absolute;"/>
';
echo '<div id="thumbMask" height="66" width="660" style="z-index: 1; top: 450px; position: absolute;">
';
echo '<img id="marker" src="images/marker.png" height="10" width="10" style="z-index: 2; top: 0px; position: absolute;" onload="setMarkerPos(0);"/>';
// Search through image array, then assign names to and display thumbnails
for ($i=0; $i < $num_pics; $i++)
{
// Point to pic in array
$current_pic = $pic_array[$i];
// Create and display image thumbnails
if ($current_pic !== "")
{
echo '<img src = "'.$directory.$current_pic.'" id = "thumb'.$i.'" height = "50" width = "50" style = "left:'.$curr_thumb_left.'px; top: 10px; border: 3px white solid; position: absolute;" onclick = "mainPicture.src = '''.$directory.$current_pic.'''; setMarkerPos('.$i.')"/>
';
// Move left value to the left [50px width + (3px padding * 2 sides) + 10px space between = 66px]
$curr_thumb_left -= 66;
}
}
echo '</div>';
echo '</div>';
?>
</body>
</html>
Chrome不使图像元素可用的只是他们的"id"值;您必须使用document.getElementById("mainPicture")来获取对DOM元素的引用。无论如何，这在所有浏览器中都可以工作，所以这样编写代码是安全的。
您试图将mainPicture的src更改为全局变量:
mainPicture.src = '.....';
尝试通过其id来引用mainPicture:
document.getElementById('mainPicture').src = '......';
您实际上并没有设置mainPicture是什么，其他浏览器必须猜测，而Chrome正在做它应该做的事情。变化:
echo '<img src = "'.$directory.$current_pic.'" id = "thumb'.$i.'" height = "50" width = "50" style = "left:'.$curr_thumb_left.'px; top: 10px; border: 3px white solid; position: absolute;" onclick = "mainPicture.src = '''.$directory.$current_pic.'''; setMarkerPos('.$i.')"/>
echo '<img src = "'.$directory.$current_pic.'" id = "thumb'.$i.'" height = "50" width = "50" style = "left:'.$curr_thumb_left.'px; top: 10px; border: 3px white solid; position: absolute;" onclick = "document.getElementById('mainPicture').src = '''.$directory.$current_pic.'''; setMarkerPos('.$i.')"/>