Tryit Editor v1.8

Source Code:
<!DOCTYPE html> <html> <head> <script src="../../ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"> </script> <script> $(document).ready(function(){ $("button").click(function(){ alert($("input:text").val()); }); }); </script> </head> <body> Firstname: <input type="text" name="fname" value="Peter"><br> Lastname: <input type="text" name="lname" value="Griffin"><br><br> <button>Return the value of the first input field</button> </body> </html>
Result:
W3Schools.com - Try it yourself