js笔记

本文主要记录本人使用js中的一些笔记

1.<a href="javascript:void(0);" onclick='add("tb1")'>

2.动态添加表单

/**
 * 动态添加上传表单
 * */
function add_upload_form(tableId, userId, upToken) {
     console.log('add_upload_form');
     upToken = "5N1L2z_at_JxxDzkht2vJMYmc72mf8Y03-5bK4xl:H_7Y-mJ4th38heNo0zs8EnDjskI=:eyJzY29wZSI6InR1b21hLXRlc3QiLCJkZWFkbGluZSI6MTM4MjY4ODY2OH0=";
     var currentMillis = new Date().getTime();
    // //105/2013-07-21/1374399378070.jpg
     var keyValue = userId + "/" + currentMillis + ".jsp";
     console.log('key:', keyValue);

    var uploadForm = document.createElement("form");
    // 一定要加入到body中！！
    document.body.appendChild(uploadForm);
    uploadForm.method = 'post';
    uploadForm.action = 'http://up.qiniu.com/';
    uploadForm.enctype = 'multipart/form-data';
    formId = formIdPrefix + (++uploadForm_id);
    console.log('function',formId);
    uploadForm.setAttribute("id",formId);
//    uploadForm.target = 'actionframe';
    // input file
    var inputFile = document.createElement("input");
    inputFile.setAttribute("name", "file");
    inputFile.setAttribute("type", "file");
    uploadForm.appendChild(inputFile);
    // key
    var key = document.createElement("input");
    key.setAttribute("name", "key");
    key.setAttribute("type", "hidden");
    key.setAttribute("value", keyValue);
    uploadForm.appendChild(key);
    //upload token
    var token = document.createElement("input");
    token.setAttribute("name", "token");
    token.setAttribute("type", "hidden");
    token.setAttribute("value", upToken);
    uploadForm.appendChild(token);
    //上传按钮
    var submitBtn = document.createElement("input"); 
    submitBtn.setAttribute("name", "upload");
    submitBtn.setAttribute("type", "submit");
    submitBtn.setAttribute("value", "上传");
    uploadForm.appendChild(submitBtn);
    
};

 3.input type为file的上传，取消上传

<input type='file' id='file_upload_1'>
var obj = document.getElementById('file_upload_1') ;   
    obj.outerHTML=obj.outerHTML;