1,不按照比例的缩放
<script language="javascript">
function changeImg1(mypic){
var xw=160;
var xl=180;
var width = mypic.width;
var height = mypic.height;
var bili = width/height;
var A=xw/width;
var B=xl/height;
if(A>1||B>1)
{
if(A<B)
{
mypic.width=xw;
mypic.height=xw/bili;
}
if(A>B)
{
mypic.width=xl*bili;
mypic.height=xl;
}
}
}
</script>
<img src="sh180.jpg" onload="changeImg(this)">
<script language="javascript">
function changeImg(mypic){
var xw=130;
var xl=160;
var width = mypic.width;
var height = mypic.height;
if (width > xw ) mypic.width = xw;
if (height > xl ) mypic.height = xl;
}
</script>
<img src="sh180.jpg" onload="changeImg(this)">
<script language="javascript">
function changeImg1(mypic){
var xw=160;
var xl=180;
var width = mypic.width;
var height = mypic.height;
var bili = width/height;
var A=xw/width;
var B=xl/height;
if(A>1||B>1)
{
if(A<B)
{
mypic.width=xw;
mypic.height=xw/bili;
}
if(A>B)
{
mypic.width=xl*bili;
mypic.height=xl;
}
}
}
</script>
<img src="sh180.jpg" onload="changeImg(this)">