Javascript限制页面图片大小，具体代码如下：
function limitImage(ImgD){
var areaWidth = 300; //你放置图片区域的宽度。
var areaHeight = 300; //你放置图片区域的高度。
var image=new Image();
image.src=ImgD.src;
if(image.width>0 && image.height>0){
flag=true;
if(image.width/image.height>= areaWidth/areaHeight){
if(image.width>areaWidth){
ImgD.width=areaWidth;
ImgD.height=(image.height*areaWidth)/image.width;
}else{
ImgD.width=image.width;
ImgD.height=image.height;
}
ImgD.alt=image.width+"×"+image.height;
}else{
if(image.height>areaHeight){
ImgD.height=areaHeight;
ImgD.width=(image.width*areaHeight)/image.height;
}else{
ImgD.width=image.width;
ImgD.height=image.height;
}
ImgD.alt=image.width+"×"+image.height;
}
}
}
