图片的等比例缩放
1
<script language="javascript">
2
function pimsize(imgname,widths,heights){
3
var w;
4var h;
5//window.alert(picimg.width);
6//window.alert(picimg.height);
7w=imgname.width;
8h=imgname.height;
9
if(imgname.width>widths){
10do
11w=w-1;
12while (w>widths) ;
13
14s=w/imgname.width;
15//window.alert(s);
16imgname.width=w;
17imgname.height=h*s;
18h=imgname.height
19
}
20//window.alert(imgname.height);
21//window.alert(heights);
22if(imgname.height>heights){
23do
24h=h-1;
25while (h>heights) ;
26
27s=h/imgname.height;
28//window.alert(s);
29imgname.width=w*s;
30imgname.height=heights;
31}
32
}
33</script>
34
函数调用： <script language="javascript"> 2
function pimsize(imgname,widths,heights){ 
3
var w; 4
var h; 5
//window.alert(picimg.width); 6
//window.alert(picimg.height); 7
w=imgname.width; 8
h=imgname.height; 9
if(imgname.width>widths){ 
10
do 11
w=w-1; 12
while (w>widths) ; 13
14
s=w/imgname.width; 15
//window.alert(s); 16
imgname.width=w; 17
imgname.height=h*s; 18
h=imgname.height 19
} 20
//window.alert(imgname.height); 21
//window.alert(heights); 22
if(imgname.height>heights){ 23
do 24
h=h-1; 25
while (h>heights) ; 26
27
s=h/imgname.height; 28
//window.alert(s); 29
imgname.width=w*s; 30
imgname.height=heights; 31
} 32
} 33
</script> 34
<img src=图片路径 border="0" onload="pimsize(图片名,274,206)" name="图片名">
