How to change text color in textbox on click event?

Discontinued products DHTMLX Touch
#1

I am doing some validation in DHTMLx touch form with textboxes. I want to change text color in textbox onchange or onclick event. Need help.
How to change text color in textbox on click event? Its urgent.

#2

You can set validation rule for the form:

dhtmlxTouch_v12_120913/samples/02_form/07_validation.html

and call validate() method when it is needed.