Hi!!
i want to validate a list box onthe onblur event and if no value is selected , display a message on the left using <span> and innerHTML
here's what i have written -
<html>
-
<head>
-
<script type="text/javascript">
-
-
function validateCB()
-
{
-
if(document.rec.loc.options.selectedIndex = = 0)
-
{
-
alert(" hi");
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return false;
-
}
-
else
-
return true;
-
}
-
-
-
function validatePID(inputfield, helptext)
-
{
-
if(inputfield.value.length !=9)
-
` {
-
if(helptext != null)
-
helptext.innerHTML = "please enter excatly 9 digits";
-
return false;
-
}
-
else
-
{
-
if(helptext != null)
-
helptext.innerHTML = "";
-
return true;
-
-
}
-
}
-
-
</script>
-
-
</head>
-
-
<form method = "post" action="rec.asp" id="rec" name="rec">
-
<table>
-
<tr>
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<td>
-
<input id='pid' name='pid' onblur="validatePID(this,document.getElementById('pid_help'))">
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<span id ="pid_help" class="help" > </span> <br> <br>
-
</td>
-
-
-
<td>
-
<select id='loc' name='loc' onblur="validateCB()"> <span id="loc_help">
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<option value = ' ' selected > select location </option>
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<option value = 'abcd' selected > abcd </option>
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<option value = '1234' selected > 1234 </option>
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</td>
-
</table>
-
-
</form>
-
</html>
-
-
well when i was doing this at work... when i entered less than 9 digits in the PID box..it dispalyed text on the left saying please enter 9 digits.. that's what i want to happen, if a user doesn't select a value from the list as well...i tried writing the code for it..but it didnt' work... so i just wrote the alert code..which was working ..but it isnt' here...
dont' know where am i going wrong...
please help !!
thank's....
9  2099  pronerd 392
Recognized Expert Contributor
There should not be a space between the equals signs.
Should be
sorry...
that was a typing error...
the problem still is the same...
please correct the code..
pronerd 392
Recognized Expert Contributor
Too many errors to explain them all. Here are working versions of the functions -
-
function validateCB() {
-
if(document.rec.loc.options.selectedIndex == 0) {
-
alert(" hi");
-
return false;
-
} else {
-
return true;
-
}
-
}
-
-
-
function validatePID(inputfield, helptext) {
-
if(inputfield.value.length !=9) {
-
if(helptext != null) {
-
helptext.innerHTML = "please enter excatly 9 digits";
-
return false;
-
} else {
-
if(helptext != null) {
-
helptext.innerHTML = "";
-
return true;
-
}
-
}
-
}
-
}
-
-
thank's a lot..........
now , what i want it use a funciton like validatePID inplace of validateCB on the onblur event....
have tried...but doesn't seem to work for me...
acoder 16,027
Recognized Expert Moderator MVP
What have you tried? Do you mean you want to display a message instead of an alert?
yeah...
the way it does for the PID....
acoder 16,027
Recognized Expert Moderator MVP
Show me what you've tried and I'll tell you what corrections you need to make.
-
function validateCB()
-
{
-
if(document.rec.loc.options.selectedIndex == 0)
-
{
-
if (helptext != null)
-
{
-
helptext.innerHTML = "please select atleast one value from the list";
-
return false;
-
}
-
else
-
{
-
if(helptext != null)
-
{
-
helptext.innerHTML = "";
-
return true;
-
}
-
}
-
-
}
-
}
-
-
-
-
function validatePID(inputfield, helptext) {
-
if(inputfield.value.length !=9) {
-
if(helptext != null) {
-
helptext.innerHTML = "please enter excatly 9 digits";
-
return false;
-
} else {
-
if(helptext != null) {
-
helptext.innerHTML = "";
-
return true;
-
}
-
}
-
}
-
}
-
-
this is what i am trying to achieve........ .
it gives the error ' is null or not an object'...
thank's ..
acoder 16,027
Recognized Expert Moderator MVP
You need to add helptext as an argument: -
function validateCB(helptext)
Also, add an argument in the HTML when you call this function similar to the call for validatePID.
In the function, your brackets are not quite correct. It'd help a lot if you could align them properly: - if(document.rec.loc.options.selectedIndex == 0)
-
{
-
if (helptext != null)
-
{
-
helptext.innerHTML = "please select atleast one value from the list";
-
return false;
-
}
-
}
-
else
-
{
-
if(helptext != null)
-
{
-
helptext.innerHTML = "";
-
return true;
-
}
-
}
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