文件在服务器上传 [英] file upload on server

问题描述

我有一个表格，我必须选择任何类型的一个文件在服务器上传PLZ帮助我



i有浏览按钮并选择类型.jpg

i不会在服务器上传，所以我能做什么

in（

javascript，java）

i have one form and i have to choose one file in any type for upload on server plz help me

i have browse button and choose type .jpg
i wont to upload on server so what can i do
in (
javascript, java )

推荐答案

function checkFile(obj) {

        var fileElement = document.getElementById(obj);
        var fileExtension = "";
        if (fileElement.value.lastIndexOf(".") > 0) {
            fileExtension = fileElement.value.substring(fileElement.value.lastIndexOf(".") + 1, fileElement.value.length);
        }
        if (fileExtension == "gif" || fileExtension == "GIF" || fileExtension == "JPEG" || fileExtension == "jpeg" || fileExtension == "jpg" || fileExtension == "JPG" || fileExtension == "PNG" || fileExtension == "png") {
            return true;
        }
        else {
            alert("You must select a GIF,JPEG,JPG and PNG file for upload");
            document.getElementById(obj).value = '';
            fileElement.focus();
            return false;
        }
    }

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