//改变图片大小
function resizepic(o)
{
var maxwidth=715; //定义最大宽度
var maxheight
var a=new Image();
a.src=o.src
if(a.width > a.height)
{
if(a.width > maxwidth)
{
o.style.width=maxwidth;
o.style.height=maxwidth/a.width*a.height;
}
}
if(a.width < a.height)
{
if (a.height> maxheight)
{
o.style.height=maxheight;
o.style.width=maxheight/a.height*a.width;
}
}
}
//无级缩放图片大小
//function bbimg(o)
//{
//var zoom=parseInt(o.style.zoom, 10)||100;
//zoom+=event.wheelDelta/12;
//if (zoom>0) o.style.zoom=zoom+'%';
//return false;
//}