取得上传图片的大小

取得上传文件的大小，客户端检测~~

&lt;script&gt;
var img = null;

function s() {
    if (img) {
		img.removeNode(true);
	}
    img = document.createElement("img");
    img.style.position = "absolute";
    img.style.visibility = "hidden";
    img.attachEvent("onreadystatechange", orsc);
    img.attachEvent("onerror", oe);
    document.body.insertAdjacentElement("beforeend", img);
    img.src = inp.value;
}

function oe() {
    alert("cant load img");
}

function orsc() {
    if (img.readyState != "complete") return false;
    alert("图片大小：" + img.offsetWidth + "X" + img.offsetHeight);
    alert("图片尺寸：" + img.fileSize);
}
&lt;/script&gt;
&lt;input id=inp type="file"&gt;
&lt;button onclick="s()"&gt;
    Test
&lt;/button&gt;

var img = null;

function s() {

if (img) {

img.removeNode(true);

}

img = document.createElement("img");

img.style.position = "absolute";

img.style.visibility = "hidden";

img.attachEvent("onreadystatechange", orsc);

img.attachEvent("onerror", oe);

document.body.insertAdjacentElement("beforeend", img);

img.src = inp.value;

}

function oe() {

alert("cant load img");

}

function orsc() {

if (img.readyState != "complete") return false;

alert("图片大小：" + img.offsetWidth + "X" + img.offsetHeight);

alert("图片尺寸：" + img.fileSize);

}

</script>

Test

</button>

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