js 獲取file

function getFilePath(filePath) {

    if (navigator.userAgent.indexOf("MSIE")!=-1){
        readFileIE(filePath);
	}else if (navigator.userAgent.indexOf("Firefox")!=-1 || navigator.userAgent.indexOf("Mozilla")!=-1){
        readFileFirefox(filePath);
	}else{
        alert("Not IE or Firefox (userAgent=" + navigator.userAgent + ")");
	}
}

function readFileIE(filePath) {
alert（document.getElementById("filePath").value）
}

function readFileFirefox(filePath) {
    try {
        netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
    } catch (e) {
        alert('路徑錯誤!');
        return;
    }

	/*console.log('value: ' + document.getElementById('filePath').value);
        console.log('files.length: ' + document.getElementById('filePath').files.length);
        console.log('fileName: ' + document.getElementById('filePath').files.item(0).fileName);
        console.log('fileSize: ' + document.getElementById('filePath').files.item(0).fileSize);
        console.log('dataurl: ' + document.getElementById('filePath').files.item(0).getAsDataURL());
        console.log('data: ' + document.getElementById('filePath').files.item(0).getAsBinary());
        console.log('datatext: ' + document.getElementById('filePath').files.item(0).getAsText("utf-8")); */

    alert(filePath.value);
}