Step 1:
Create you Form in your local device with HTML and CSS as like below.

Code:
[sourcecode]
<form method="POST">
<label>Full Name:</label><input type="text" name="FullName" value="" id="FullName">
<label>E-mail:</label><input type="text" name="Email" value="" id="Email">
<label>Comments:</label><textarea name="Comments" rows="8" cols="0" id="Comments"></textarea>
<img onClick="store_user_data()" src="submit.jpg" alt="Submit" />
</form>
[/sourcecode]
I only showed you basic codes for better understanding. You can use CSS and HTML properties as you like.
Step 2:
Note: you have three fields like – Full Name, E-Mail and Comments.
Now, create a Google form with these three fields and generate a spreadsheet. Don’t think about advance settings.
Step 3:
Open Google form source view by pressing ctrl+u. Copy full code into an editor. From this source code note your three fields input name and page action URL.
Full Name: entry.1101958291
E-mail: entry.43687256
Comments: entry.73393734
Action URL: https://docs.google.com/forms/d/17kFZ_DhdLWh2veYpCkndFJVy-E-S6XKguiu1sRjc6Xs/formResponse
Step 4:
Write a JavaScript function as like below-
[sourcecode]
function store_user_data()
{
var your_name = $("#entry_1018598333").val();
var email = $("#entry_1487024520").val();
var your_comment = $("#entry_141273746").val();
post_data = {‘entry.1101958291’:your_name, ‘entry.43687256’:email, ‘entry.73393734’:your_comment};
$.post(‘https://docs.google.com/forms/d/17kFZ_DhdLWh2veYpCkndFJVy-E-S6XKguiu1sRjc6Xs/formResponse’, post_data);
alert(‘Thank You’);
return false;
}
[/sourcecode]
Done!