var datatable = null;
var db = openDatabase("MyData", "", "My Database", 1024 * 100);
function init() {
datatable = document.getElementById("datatable");
showAllData();
}
function removeAllData() {
for(var i = datatable.childNodes.length - 1; i >= 0; i--) {
datatable.removeChild(datatable.childNodes[i]);
}
var tr = document.createElement("tr");
var th1 = document.createElement("th");
var th2 = document.createElement("th");
var th3 = document.createElement("th");
th1.innerHTML = "姓名";
th2.innerHTML = "留言";
th3.innerHTML = "时间";
tr.appendChild(th1);
tr.appendChild(th2);
tr.appendChild(th3);
datatable.appendChild(tr);
}
function showData(row) {
var tr = document.createElement("tr");
var td1 = document.createElement("td");
td1.innerHTML = row.name;
var td2 = document.createElement("td");
td2.innerHTML = row.message;
var td3 = document.createElement("td");
var t = new Date();
t.setTime(row.time);
td3.innerHTML = t.toLocaleDateString() + " " + t.toLocaleTimeString();
tr.appendChild(td1);
tr.appendChild(td2);
tr.appendChild(td3);
datatable.appendChild(tr);
}
function showAllData() {
db.transaction(function(tx) {
tx.executeSql("CREATE TABLE IF NOT EXISTS MsgData(name TEXT,message TEXT,time INTEGER)", []);
tx.executeSql("SELECT * FROM MsgData", [], function(tx, rs) {
removeAllData();
for(var i = 0; i < rs.rows.length; i++) {
showData(rs.rows.item(i))
}
})
})
}
function addData(name, message, time) {
db.transaction(function(tx) {
tx.executeSql("INSERT INTO MsgData VALUES (?,?,?)", [name, message, time], function(tx, rs) {
alert("留言成功！");
},
function(tx, error) {
alert(error.source + "::" + error.message);
}
)
})
}
function saveData() {
var name = document.getElementById("name").value;
var memo = document.getElementById("memo").value;
var time = new Date().getTime();
addData(name, memo, time);
showAllData();
}
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