Javascript限制頁面圖片大小，具體代碼如下：

function limitImage(ImgD){

var areaWidth = 300; //你放置圖片區(qū)域的寬度。

var areaHeight = 300; //你放置圖片區(qū)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;

}

}

}

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