我需要一点帮助我的代码有366个图像需要更改,名为001.jpg,002.jpg … 366.jpg.它获取日期并为其绘制图片.代码有效,但我无法在img标签中输出.
<html> <head> <script type="text/javascript"> var firstJan = Math.floor((new Date().setFullYear(new Date().getFullYear(),1))/86400000); var today = Math.ceil((new Date().getTime())/86400000); var dayOfYear = today-firstJan; var bgdImage; if((dayOfYear+'').length == 1) bgdImage = '00'+dayOfYear+'.jpg'; else if((dayOfYear+'').length == 2) bgdImage = '0'+dayOfYear+'.jpg'; else bgdImage = dayOfYear+'.jpg'; document.getElementById('bla').src = "bgdImage"; </script> </head> <body onload=img()> <img id="bla" width="100%" height="100%" /> </body> </html>
解决方法
就像我在初始评论中所说的那样,将代码放在函数“mg()中,然后在< body onload =”javascript：img();“>中调用.我还从输出语句中删除了引号到src. document.getElementById(‘bla’).src = bgdImage; bgdImage是你的变量,把它放在引号“bgdImage”中只是一个带有文本bgdImage的String.
<html>
<head>
<script type="text/javascript">
function img()
{
var firstJan = Math.floor((new Date().setFullYear(new Date().getFullYear(),1))/86400000);
var today = Math.ceil((new Date().getTime())/86400000);
var dayOfYear = today-firstJan;
var bgdImage;
if((dayOfYear+'').length == 1)
bgdImage = '00'+dayOfYear+'.jpg';
else if((dayOfYear+'').length == 2)
bgdImage = '0'+dayOfYear+'.jpg';
else
bgdImage = dayOfYear+'.jpg';
document.getElementById('bla').src = bgdImage;
}
</script>
</head>
<body onload="javascript:img();">
<img id="bla" width="100%" height="100%" />
</body>
</html>
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