Question: I have a fixed element (div) that I want to scroll with my page. However, when the fixed element reaches the end of the container (div) I want it to stop scrolling with the page.

I'm trying to do this with CSS, or is jquery my best option?

Answer: 
Form validation:

* <http://www.webcheatsheet.com/javascript/form_validation.php>
* <http://www.w3schools.com/JS/js_form_validation.asp>

JavaScript regular expressions:

* <http://www.regular-expressions.info/javascript.html>
* <http://www.javascriptkit.com/javatutors/redev2.shtml>
Java Script condition for text field validation for name 

var ck\_name = /^[A-Za-z0-9]{2,75}$/;

text field validation for Number

var ck\_number=/^[0-9]{1,10}$/;