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Check text field for null in javascript if then

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I'm trying to use an if statement in js that references a data field to see if there's a null value. I can't get the syntax to work though. 

Here's the code in the footer of a Details datapage: 

<script>
   var v_lk = parseFloat(document.getElementById("EditRecordmstrSuppliers_LinkedIn").value);

if(!(v_lk) === "")
{
  document.getElementById('section3').style.display = "inline";
  document.getElementById('section4').style.display = "none";
}
else
{
  document.getElementById('section3').style.display = "none";
  document.getElementById('section4').style.display = "inline";
}
</script>

What's odd is I got this code to work using a test field that was a number format, using 

<script>
   var v_lk = parseFloat(document.getElementById("EditRecordmstrSuppliers_TestNumberfield").value);

  if(!isNaN(v_lk))

So it seems like I'm just not referencing the 'live' field correctly because it's a text field instead of a number field. Does anyone know the correct way to reference a text field to check for null/blank values? 

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Hi ,

you could try this..

var x;

if (x =='') or (x !=='')

The element must not be hidden for it to work.

 

 

you have to trick it

 

var newone;

newone = document.getElementById('InsertRecordCHKBOX');

 

if (newone == null) {

newone=0

}

 

 

Hope this helps.

Thanks

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Heres an example that works, -

to check a checkbox based on input from a non-hidden field or element.

 

<script type="text/javascript">

var tagidvalue ;

 

tagidvalue=document.getElementById('InsertRecordTagID').value;

if (tagidvalue !=='')

{

 

document.getElementById('InsertRecordTagEmpRegisteredTagInSystem').checked=true;

document.getElementById('InsertRecordTagEmpIsTagRegistrant').checked=true;

 

}

 

else if (tagidvalue =='')

 

{

 

document.getElementById('InsertRecordTagEmpRegisteredTagInSystem').checked=false;

document.getElementById('InsertRecordTagEmpIsTagRegistrant').checked=false;

 

}

 

//alert (tagidvalue)


</script>

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Hi TexterVaid,

Thanks for the suggestion- I wasn't able to get it to work using that for some reason. I fiddled around and finally got the code to work- it seems Caspio is somewhat random as to what js works with its data fields. 

Removing the parseFloat, changing the if clause a bit (I tried 'else if' as suggested but just the 'else' ended up working) and making the fields 'hidden' seemed to get it right:

   var v_lk = document.getElementById("EditRecordmstrSuppliers_LinkedIn").value;

if(!(v_lk) == "")
{

Thanks again for helping and hope this solution works for someone else too- 

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Hi,

I'm trying to implement the code above to hide columns 7 and 8 in a tabular report if their values are null.  I can't quite seem to tweak the code to make it work for me.  See code below.  I declared a variable called empqty, which should be the name of the field to check if there are values, if the data is empty (null) then the tabular report should hide columns 7 and 8.  Any assistance would be greatly appreciated!

 

Thank you!

<script language="javascript" type="text/javascript">
var stl='none';
var tbl = document.getElementsByTagName('table')[0];
var rows = tbl.getElementsByTagName('tr');
var empqty = document.getElementById('Employee_Productivity_Qty');
If (empqty == null) {
for (var row=1; row<rows.length;row++)
{
var cels = rows[row].getElementsByTagName('td');
cels[7].style.display=stl;
cels[8].style.display=stl;
}
var heads= tbl.getElementsByTagName('th');
heads[7].style.display=stl;
heads[8].style.display=stl;
}
</script>
 

 

 

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