复制代码 代码如下:

function validateFileSize(id, maxsize) {

var btnsave = document.getElementById("Button2");

btnsave.disabled = false;

var filepath = "";

var fileupload = document.getElementById(id);

if (fileupload.value.length < 5) { alert('请选择文件！'); return; }

var agent = window.navigator.userAgent;

if (document.all) {

var isIE7 = agent.indexOf('MSIE 7.0') != -1;

var isIE8 = agent.indexOf('MSIE 8.0') != -1;

//IE7和IE8获得文件路径

if (isIE7 || isIE8) {

fileupload.select();

filepath = document.selection.createRange().text;

}

//IE6获得文件路径

else

{ filepath = file.value; }

//PageMethods.ValidateFile(filepath, maxsize, ieCallBack);

alert(filepath);

}

if (agent.indexOf("Firefox") >= 1) {

alert("FF");

alert(getValue());

return false;

if (fileupload.files) {

var size = fileupload.files[0].fileSize;

if (size > parseInt(maxsize)) {

fileupload.parentNode.innerHTML = '<input type="file" name="' + fileupload.name + '" id="' + fileupload.id + '" onchange="disableSave(this);"/> ';

alert("文件超过大小！");

}

else { alert("文件上传成功！"); }

}

}

}