用 JavaScript 实现网页图片等比例缩放效果

 

<script language="javascript" type="text/javascript">
<!--
// 说明：用 JavaScript 实现网页图片等比例缩放
function DrawImage(ImgD,FitWidth,FitHeight)
{
var image=new Image();
image.src=ImgD.src;
if(image.width>0 && image.height>0)
{
if(image.width/image.height>= FitWidth/FitHeight)
{
if(image.width>FitWidth)
{
ImgD.width=FitWidth;
ImgD.height=(image.height*FitWidth)/image.width;
}
else
{
ImgD.width=image.width;
ImgD.height=image.height;
}
}
else
{
if(image.height>FitHeight)
{
ImgD.height=FitHeight;
ImgD.width=(image.width*FitHeight)/image.height;
}
else
{
ImgD.width=image.width;
ImgD.height=image.height;
}
}
}
}
//-->
</script>

调用方法：

<img id="img1" src="../img/15.gif" width="66px" height="66px" οnlοad="DrawImage(img1,200,200)" />