为什么我的jsp代码中的搜索按钮不工作？ [英] Why does the search button in my jsp code not work?
问题描述
以下是我的jsp的代码，其中有两个输入字段 regNo 和 studentName 。
Following is the code of my jsp where there are two input fields regNo and studentName.
我想让用户在regNo字段中只输入数字。它不应该包含任何空格，数字的长度应该只有12。
I want the user to enter only numbers in regNo field. It should not contain any spaces and the length of the digits should be only 12.
我添加了字符的检查，我添加了CSS，现在我的搜索按钮不是
I added the check for characters and I added CSS and now my Search button isn't working.
<head>
<script src="http://code.jquery.com/jquery.min.js"></script>
<style>
#mycontainer, h1, h3 {
text-align:center;
}
form {
display:inline-block;
}
#errorMsgNumber {
display: none;
background: brown;
color: white;
}
</style>
<script>
var regNoField = document.getElementById('regNo');
var regNoMessage = document.getElementById('regNoErrorMsgNumber');
var inputFieldsButton = document.getElementById('inputFields');
regNoField.addEventListener('keydown', onChange);
function onChange(e) {
if (e.keyCode < 48 || e.keyCode > 57) {
regNoMessage.style.display = 'block'
};
if(/^\d+$/.test(regNoField.value)) {
inputFieldsButton.disabled = false;
} else {
inputFieldsButton.disabled = true;
}
}
$(document).ready(function(){
$('#inputFields').click(function(event){
if (document.getElementById('regNo').value !=""){
$("#number").submit();
}else if(document.getElementById('studentName').value !=""){
$("#name").submit();
}
});
});
</script>
</head>
<body>
<div id="mycontainer">
<form method="post" action="number" id="number">
<div id="regNoErrorMsgNumber">Only numbers are allowed</div>
<div style="text-align: center;" >
<!-- //TODO: Only number, no spaces, no special symbol and 12 digit check-->
<input width="20" type="text" data-validation="numbers" id="regNo" name="regNo" size="30" maxLength="50" placeholder="Enter Register Number"> OR
</div>
</form>
<form method="post" action="name" id="name">
<input type="text" id="studentName" name="studentName" size="30" maxLength="50" placeholder="Enter Student Name"></input>
</form>
</div>
<div style="text-align: center;">
<input id="inputFields" type="button" value="Search" />
</div>
</body>
推荐答案
这是JavaScript代码的顺序。我把你的java脚本代码放在元素之后。现在它会工作。
I made little modification in your code. It was the ordering of javascript code. I have put your java script code after the elements. Now it will work.
<head>
<script src="http://code.jquery.com/jquery.min.js"></script>
<style>
#mycontainer, h1, h3 {
text-align:center;
}
form {
display:inline-block;
}
#errorMsgNumber {
display: none;
background: brown;
color: white;
}
</style>
</head>
<body>
<div id="mycontainer">
<form method="post" action="number" id="number">
<div id="regNoErrorMsgNumber">Only numbers are allowed</div>
<div style="text-align: center;" >
<!-- //TODO: Only number, no spaces, no special symbol and 12 digit check-->
<input width="20" type="text" data-validation="numbers" id="regNo" name="regNo" size="30" maxLength="50" placeholder="Enter Register Number"> OR
</div>
</form>
<form method="post" action="name" id="name">
<input type="text" id="studentName" name="studentName" size="30" maxLength="50" placeholder="Enter Student Name"></input>
</form>
</div>
<div style="text-align: center;">
<input id="inputFields" type="button" value="Search" />
</div>
</body>
<script>
var regNoField = document.getElementById('regNo');
var regNoMessage = document.getElementById('regNoErrorMsgNumber');
var inputFieldsButton = document.getElementById('inputFields');
regNoField.addEventListener('keydown', onChange);
function onChange(e) {
if (e.keyCode < 48 || e.keyCode > 57) {
regNoMessage.style.display = 'block'
};
if(/^\d+$/.test(regNoField.value)) {
inputFieldsButton.disabled = false;
} else {
inputFieldsButton.disabled = true;
}
}
$(document).ready(function(){
$('#inputFields').click(function(event){
if (document.getElementById('regNo').value !=""){
$("#number").submit();
}else if(document.getElementById('studentName').value !=""){
$("#name").submit();
}
});
});
</script>
你可以做一个事情，而不是引用jquery从网站本身，你可以参考google托管的外观在 http： //encosia.com/3-reasons-why-you-should-let-google-host-jquery-for-you/
You can do one more thing instead of referring the jquery from website itself you can refer the google hosting look at the link for the benefit http://encosia.com/3-reasons-why-you-should-let-google-host-jquery-for-you/
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