自動實作圖檔的縮放js代碼:
function scalePhoto(imgId,width,height){
var img = document.getElementById(imgId);
if(img != null){
var imgWidth = img.width;
var imgHeight = img.height;
if(imgWidth>width&&imgHeight>height){
//both image's width and height are larger than required one
var widthRate = imgWidth/width;
var heightRate = imgHeight/height;
if(widthRate>heightRate){
//use width to retrieve the image
img.width=width;
img.height=imgHeight*(width/imgWidth);
}else{
img.height=height;
img.width=imgWidth*(height/imgHeight);
}
}
else if(imgWidth>width){
//the image width lg than the required width
img.width=width;
img.height=imgHeight*(width/imgWidth);
else if(imgHeight>height){
//the image height lg than the required
img.height=height;
img.width=imgWidth*(height/imgHeight);
}
}
}
将以上代碼複制後生成一個js檔案。
在需要調用的asp檔案中加入:
<SCRIPT src="includes/image.js" type=text/javascript></SCRIPT>
主要需要注意包含檔案的路徑。
然後在需要進行圖象檔案縮放的地方進行相應更改即可,其參考代碼如下,紅色部分即為修改部分。
<img src="<%=format_topphoto(rs3("Photo_top"))%> " width="92" height="109" border=0 onload=scaleDefaultPhoto(<%=format_topphoto(rs3("Photo_top"))%>,100,133)>
本文轉自 simeon2005 51CTO部落格,原文連結:http://blog.51cto.com/simeon/14379