Javascript Validating Numbers xhtml
Question
I was working on some javascript homework and it states as follows:
-validate that the Customer ID is a Number, not a string. Also all Customer IDs are numbers between 3000 and 3999. All 4 digit numbers. Validate that all Customer IDs are numbers between 3000 and 3999.
-validate that the AcctNo is a Number, not a string. And the number is between 90000 and 99999.
As I was working on the code, the part with the numbers always gave me errors, as I searched on the web for help, it came up with //
Any help is nice, thanks (:
Xhtml
<head>
<script type = 'text/javascript'>
// <![CDATA[
$('#submit').click(function(){
validateRange();
validateRa();
})
function validateRange() {
var txtVal = document.getElementById("CustomerID").value;
var txtVal1=parseInt(txtVal);
if (txtVal1 >= 3000 && txtVal1 <= 3999) {
return true;
}
else
alert('Please enter a number between 3000-3999');
return false;
}
// ]]
function validateRa() {
var txtVal1 = document.getElementById("AcctNo").value;
var txtVal2=parseInt(txtVal1);
if (txtVal2 >= 90000 && txtVal2 <= 99999) {
return true;
}
else
alert('Please enter a number between 90000-99999');
return false;
}
// ]]
</script>
<title>Account Lookup</title>
</head>
<body>
<h1> Please Provide Your Information</h1>
<p><input type="text" id="AcctNo" value="Account Number"/></p>
<p><input type="text" id="CustomerID" value="CustomerID" onchange="validateRange()"/></p>
<p><input type="text" name="Type" value="Account Type" onchange="validateRange()"/></p>
<p><input type="text" name="balance" value="Balance"/></p>
<p class="submit" />
<input type="submit" name="commit" value="Submit" id="submit" /><button type="reset" value="Clear">Clear</button></p>
</body>
</html>
4 answers
solution1
0 2014-09-26 04:39:27
use id insted of name in html
html
<h1> Please Provide Your Information</h1>
<p><input type="text" id="AcctNo" value="Account Number"/></p>
<p><input type="text" id="CustomerID" value="CustomerID" onchange="validateRange()"/></p>
<p><input type="text" name="Type" value="Account Type" onchange="validateRange()"/></p>
<p><input type="text" name="balance" value="Balance"/></p>
<p class="submit" />
<input type="submit" name="commit" value="Submit" id="submit" /><button type="reset" value="Clear">Clear</button></p>
js
$('#submit').click(function(){
validateRange();
validateRa();
})
function validateRange() {
var txtVal = document.getElementById("CustomerID").value;
var txtVal1=parseInt(txtVal);
if (txtVal1 >= 3000 && txtVal1 <= 3999) {
return true;
}
else
alert('Please enter a number between 3000-3999');
return false;
}
// ]]
function validateRa() {
var txtVal1 = document.getElementById("AcctNo").value;
var txtVal2=parseInt(txtVal1);
if (txtVal2 >= 90000 && txtVal2 <= 99999) {
return true;
}
else
alert('Please enter a number between 90000-99999');
return false;
}
solution2
0
Try this:
var txtVal = parseInt(document.getElementById("CustomerID").value) || 0;
And
var txtVal1 = parseInt(document.getElementById("AcctNo").value) || 0;
Also:
else {//<-- braces,since it has multiple lines
alert('Please enter a number between 3000-3999');
return false;
}
solution3
0 2014-09-26 04:47:05
There is problem with your else condition
you need to include braces in the else block too So you must have
else
{
alert('Please enter a number between 3000-3999');
return false;
}
and
else
{
alert('Please enter a number between 90000-99999');
return false;
}
Also
var newtxtval = parseInt(txtval);
add the above line in both the functions and it will work
solution4
0 2014-09-26 05:33:21
You have the
nameof the text boxes asCustomerIDandAcctNonot theidof the text boxes. So when your validation function accessing them usingdocument.getElementByIdmethod will always give null reference, hence it will give java script error whenever you change the content of theCustomerIDtext box.Function
validateRa()is not at all called in your code, which is used to validate the account number.
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