在这里，我上传了这个链接http://harvey.binghamton.edu/~rnaik1/myForm.html，你可以看到我的向上滚动向下按钮是如何在javascript中工作但现在我正在使用Ajax请求到服务器上的php脚本来检索所有数据来自数据库表。 以下是我所做工作的链接：http://harvey.binghamton.edu/~rnaik1/myScrollform.html 除了向上滚动和向下滚动按钮外，一切都正常。 输入第6条记录后，在列表中添加5条记录后，将显示最新的5条记录。
我想让myScrollform.html的scrollup和down按钮与myForm.html中的方式相同。任何帮助对我都有帮助并表示赞赏。
这是我的代码：
<html>
<head>
<title>My Scrolling Data Form</title>
<script src="./jquery-1.11.0.min.js"></script>
</head>
<body bgcolor="silver">
<center><h1>My Scrolling Data Form</h1>
<div id="scrollbar">
<input type="button" name="up" id="scrollup" value="Scroll Up" >
<input type="button" name="up" id="scrolldown" value="Scroll Down">
</div>
<div id="mydata" style="height: 200px; overflow-y: scroll">
Currently we have no data
</div>
<hr>
<div id="addformdata">
<form name="addForm" >
To add data to the list, fill in the form below and click on "Add"
<br>
<td><input type="text" id="name" name="namei" value=""></td>
<td><input type="text" id="ssn" name="ssni" value="" ></td>
<td><input type="text" id="date" name="birthi" value="" ></td>
<td><input type="text" id="currency" name="xxxxi" value=""></td>
<input type="button" name="add" value="Add" onclick="validateForm(); return false;">
</form>
</div>
</center>
</body>
</html>
<script type="text/javascript">
// Arrays to store values
var name_Array=new Array();
var ssn_Array=new Array();
var date_Array=new Array();
var currency_Array=new Array();
var Index = 0;
var first = 0;
var last = 0;
var scrolled = 0;
var random_Array=new Array();
$(document).ready(function(){
fetchdata();
$("#scrollup").on("click" ,function(){
// alert('hi');
// scrolled=scrolled+100;
$("#mydata").animate({
scrollTop: 0
}, 800);
});
$("#scrolldown").on("click" ,function()
{
// console.log($elem.height());
$("#mydata").animate({
scrollTop: 5000
}, 800);
});
});
function deleteRecord(id)
{
if(confirm('Are you Sure you Want to delete this record')){
$.ajax({
url:"insdel.php",
type:'POST',
data: {
"action": "delete",
"id": id
},
success:function(data)
{
fetchdata()
console.log('success');
}
});
}
}
function fetchdata()
{
// var scrolled=0
$.ajax({
url:"insdel.php",
type:'POST',
data: {
"action": "fetch"
},
success:function(data)
{
$("#mydata").html('')
$("#mydata").html(data);
console.log('success');
}
});
}
function validateForm()
{
var name = document.getElementById("name");
var ssn = document.getElementById("ssn");
var date = document.getElementById("date");
var currency = document.getElementById("currency");
var error = "";
//Name validation
if(name.value=="")
{
//Check for empty field
name.focus();
error = "Please Enter Name\n";
}
else
{ //format specifier
var letters = /^[a-zA-Z_ ]+$/;
//Check for format validation
if(!name.value.match(letters))
{
name.focus();
error = error + "Name contains only characters and spaces\nPlease Renter Name\n";
}
}
//Date validation
if(date.value=="")
{
//Check for empty field
date.focus();
error = error + "Please Enter Date\n";
}
else
{ //format specifier
var date_regex = /^((((0[13578])|([13578])|(1[02]))[\/](([1-9])|([0-2][0-9])|(3[01])))|(((0[469])|([469])|(11))[\/](([1-9])|([0-2][0-9])|(30)))|((2|02)[\/](([1-9])|([0-2][0-9]))))[\/]\d{4}$|^\d{4}$/;
//check for format validation
if(!date.value.match(date_regex))
{
date.focus();
error = error + "Date must be in mm/dd/yyyy format\nPlease Renter Date\n";
}
}
//SSN validation
if(ssn.value=="")
{
//check for empty field
ssn.focus();
error = error + "Please Enter SSN\n";
}
else
{
//format specifier
var numbers = /^\d{3}((-?)|\s)\d{2}((-?)|\s)\d{4}$/g;
//check format validation
if(!ssn.value.match(numbers))
{
ssn.focus();
error = error + "SSN must be in xxx-xx-xxxx format\nPlease Renter SSN\n";
}
}
//Currency validation
if(currency.value=="")
{
//check for empty field
currency.focus();
error = error + "Please Enter Currency\n";
}
else
{
//format specifier
var pattern = /^(\$)\d+(\.\d{1,3})?$/g ;
//check for format validation
if(!currency.value.match(pattern))
{
currency.focus();
error = error + "Currency must be in $xx.xxx format\nPlease Renter Currency\n";
}
}
if(error)
{
alert(error);
return false;
}
else
{
var name = document.getElementById("name").value;
var ssn = document.getElementById("ssn").value;
var date = document.getElementById("date").value;
var currency = document.getElementById("currency").value;
console.log(name)
adduser(name,ssn,date,currency);
return true;
}
}
function insertToList()
{
// call a function to validate the fields
var valid_function = validateForm();
if(valid_function == false)
{
return false;
}
else
{
//get the entered values from fields
var name = document.getElementById("name");
var ssn = document.getElementById("ssn");
var date = document.getElementById("date");
var currency = document.getElementById("currency");
// push the values in the array
name_Array.push(name.value);
ssn_Array.push(ssn.value);
date_Array.push(date.value);
currency_Array.push(currency.value);
// generate and push random number in the array to search the record in array and then delete that record.
random_Array.push(Math.floor((Math.random()*100)+1));// http://stackoverflow.com/questions/8610635/how-do-you-use-math-random-to-generate-random-ints
//function to insert values to list
InsertValues();
// clear the fields after each add
clearFields();
alert("Record is successfully added to above list.");
// set focus back on the name field
name.focus();
}
}
function clearFields()
{
document.getElementById("name").value = "";
document.getElementById("ssn").value = "";
document.getElementById("date").value = "";
document.getElementById("currency").value = "";
}
// function to add to the list
function InsertValues()
{
var temp = 1,temp1 = 1,index = 0,i=0;
index = name_Array.length - 5;
for(i=0;i< name_Array.length;i++)
{
// when only first 5 entries are added to the list
if(name_Array.length>5)
{
// skip the first values so that only top 5 are shown in the list
if(temp>s)
{
if(temp1==5)
{
last = i;
}
else if(temp1==1)
{
first = i;
Index = i;
}
if(temp1<=5)
{
//initialise values of fields to the list
var str = "name" + temp1;
document.getElementById(str).value = name_Array[i];
str = "ssn" + temp1;
document.getElementById(str).value = ssn_Array[i];
str = "birth" + temp1;
document.getElementById(str).value = date_Array[i];
str = "xxxx" + temp1;
document.getElementById(str).value = currency_Array[i];
str = "random" + temp1;
document.getElementById(str).value = random_Array[i];
}
temp1++;
}
}
else
{
var str = "name" + temp;
document.getElementById(str).value = name_Array[i];
str = "ssn" + temp;
document.getElementById(str).value = ssn_Array[i];
str = "birth" + temp;
document.getElementById(str).value = date_Array[i];
str = "xxxx" + temp;
document.getElementById(str).value = currency_Array[i];
str = "random" + temp;
document.getElementById(str).value = random_Array[i];
}
temp++;
}
}
// Delete a record from the list
function delete_a_Record(record)
{
var remove = 0,i=0,j=1;
var name = document.getElementById("name" + record.value);
var delRecord = document.getElementById("random" + record.value);
if(name.value)
{
remove = 1;
}
// check for the existence of record
if(remove == 1)
{
if(confirm("Click on 'OK' to delete the record\n"))
{
while(i < random_Array.length)
{
if(delRecord.value==random_Array[i])
{
// if yes then remove that record from list
name_Array.splice(i, 1);
ssn_Array.splice(i, 1);
date_Array.splice(i, 1);
currency_Array.splice(i, 1);
random_Array.splice(i, 1);
}
i++;
}
// make entire list empty
while(j <= 5)
{
var str = "name" + j;
document.getElementById(str).value = "";
str = "ssn" + j;
document.getElementById(str).value = "";
str = "birth" + j;
document.getElementById(str).value = "";
str = "xxxx" + j;
document.getElementById(str).value = "";
str = "random" + j;
document.getElementById(str).value = "";
j++;
}
//call this function again to insert values in the list
InsertValues();
record.checked = false;
}
}
else
{
alert("Nothing to delete in this record.");
record.checked = false;
}
}
// function to perform scrollUp n scrollDown
function handleScrolling(type)
{
var j,k,temp2 = 1;
// perform scroll only when there are more than 5 records in the list
if(name_Array.length>5)
{ // scroll up
if(type==1)
{
first--; // decrement the pointer to see upper records
if(first>=0)
{
for (j = first; j < name_Array.length; j++) // its showing top most record from jth position
{
var str = "name" + temp2;
document.getElementById(str).value = name_Array[j];
str = "ssn" + temp2;
document.getElementById(str).value = ssn_Array[j];
str = "birth" + temp2;
document.getElementById(str).value = date_Array[j];
str = "xxxx" + temp2;
document.getElementById(str).value = currency_Array[j];
str = "random" + temp2;
document.getElementById(str).value = random_Array[j];
temp2++;
}
}
else
{
alert("Top of the list is reached\n");
first++;// increment the pointer to see lower records
}
}
else // scroll down
{
// increment the start point to see lower records if any
first++;
if(first<=Index)
{
for (k = first; k < name_Array.length; k++) //its showing bottom most record in the list from kth position
{
var str = "name" + temp2;
document.getElementById(str).value = name_Array[k];
str = "ssn" + temp2;
document.getElementById(str).value = ssn_Array[k];
str = "birth" + temp2;
document.getElementById(str).value = date_Array[k];
str = "xxxx" + temp2;
document.getElementById(str).value = currency_Array[k];
str = "random" + temp2;
document.getElementById(str).value = random_Array[k];
temp2++;
}
}
else
{
alert("Bottom most record is reached\n");
first--;//decrement the pointer to see upper records if any
}
}
}
else
{
alert("Scrolling strikes for records more than 5\n");
return false;
}
}
function adduser(name,ssn,date,currency)
{
$.ajax({
url:"insdel.php",
type:'POST',
data: {
"name": name,
"ssn": ssn,
"date": date,
"currency": currency,
"action": "add"
},
success:function(data){
console.log('success');
fetchdata();
}
});
}
</script>
// php文件
<?php
extract($_POST);
$con = mysql_connect('localhost', 'root', '');
if (!$con) {
die('Could not connect: ' . mysql_error($con));
}
//mysql_select_db("ripal");
mysql_select_db("test");
//$sql = "SELECT * FROM user WHERE id = '" . $q . "'";
if ($action == 'add') {
$sql = "INSERT INTO myform(name,ssn,date,income)VALUES('" . mysql_real_escape_string($name) . "','" . mysql_real_escape_string($ssn) . "','" . mysql_real_escape_string($date) . "','" . mysql_real_escape_string($currency) . "')";
// echo $sql;
mysql_query($sql);
echo mysql_insert_id();
} else if ($action == 'fetch') {
$sql = "select * from myform";
// echo $sql;
$result = mysql_query($sql);
$str = '<form name="myForm">
<table width="page">
<tr>
<td align="center"></td>
<td align="center"></td>
<td align="center"></td>
<td align="center"></td>
<td align="center"></td>
<td></td>
</tr>';
if (mysql_num_rows($result) > 0) {
while ($row = mysql_fetch_array($result)) {
$id = $row['id'];
$name = $row['name'];
$ssn = $row['ssn'];
$date = $row['date'];
$currency = $row['income'];
$str.='<tr>
<td><input type="radio" id="' . $id . '" name="del" onclick="deleteRecord(this.id);"></td>
<td><input readonly type="text" value="' . $name . '" id="name1" name="name"></td>
<td><input readonly type="text" value="' . $ssn . '" id="ssn1" name="ssn"></td>
<td><input readonly type="text" value="' . $date . '" id="birth1" name="birth"></td>
<td><input readonly type="text" value="' . $currency . '" id="xxxx1" name="xxxx"><input type="hidden" name="random1" id="random1"></td>
</tr>';
}
}
$str.=' <tr>
<td colspan="5" id="scrollCount" align="center" style="padding-top:10px;"> </td>
</tr>
</table>
</form>';
if (mysql_num_rows($result) == 0) {
echo 'No data in Our Database please add one or more';
} else {
echo $str;
}
} else if ($action = 'delete') {
$sql = "DELETE from myform WHERE id=$id";
// echo $sql;
$result = mysql_query($sql);
echo $result;
}
mysql_close($con);