图片(img标签)大小自适应

 

 1 $(function(){

 2              var myimg,oldwidth,oldheight;

 3                var maxwidth=249;

 4                var maxheight=187;

 5                var imgs = document.getElementsByTagName('img'); 

 6              

 7                for(i=0;i<imgs.length;i++){

 8                  myimg = imgs[i];

 9              

10                  if(myimg.width > myimg.height)

11                  {

12                      if(myimg.width > maxwidth)

13                      {

14                         oldwidth = myimg.width;

15                         myimg.height = myimg.height * (maxwidth/oldwidth);

16                         myimg.width = maxwidth;

17                      }

18                  }else{

19                      if(myimg.height > maxheight)

20                      {

21                         oldheight = myimg.height;

22                         myimg.width = myimg.width * (maxheight/oldheight);

23                         myimg.height = maxheight;

24                      }

25                  }

26                }

27         })