How can I pass a value into a form using javascript?

I could do it with PHP like this 

It is src=http://form.jotform.com/form/13084453420?keyword=[insert_php]echo $_GET["keyword"];

How do I do it with Javascript? 

From where are you fetching the values? With javascript, you will have to write a code that would construct the form URL along with query string and output it into an element or a field.

Example: Click the RUN button to test it

https://www.w3schools.com/code/tryit.asp?filename=FW0TPK4DFCMP

If you need further assistance, let us know.

This is great, but can you give me the code to embed it as well?  I don't want it to pop up on a different screen.  Just set the Variable value as "Test" and set it to embed and use this form. 

Thanks!  

https://form.jotform.com/jsform/82644164821255

HEy could you help with this? 

I'll work on a sample code and let you know.

Here's an example:

<script>

var keywordValue ="test";

document.write('<script type="text/javascript" src="https://form.jotform.com/jsform/82644164821255?keyword='+keywordValue+'"><'+'/script>');

</script>

Change the ones in bold text which is the keyword value.

Hey thanks so much, I just need one more thing, I'm trying to PAss the URL value into the variable with Javascript and I tried the thing above, but I don't really know javascript and it doesn't work.  

Can you fix it?  Thanks amazing help if you can get this to work ! 

<script>

function ParseURLParameter(Parameter)

{

var FullURL = window.location.search.substring(1);

var ParametersArray = FullURL.split('&');

for (var i = 0; i < ParametersArray.length; i++)

{

var CurrentParameter = Parameters[i].split('=');

if (CurrentParameter[0] == Parameter)

{

return CurrentParameter[1];

}

}

}

var PageName = ParseURLParamater('page');

var keywordValue ="Rafe";

document.write('<script type="text/javascript" src="https://form.jotform.com/jsform/82644164821255?whatIs='+PageName+'"><'+'/script>');

</script>

Unfortunately, it is not possible for us to provide javascript code on this support. You may want to hire a web developer for this. I'd recommend using Upwork.