Join two scripts together

Hello everyone,

I display the text which is in csv file in the asset by using WebViewer. I can increase or decrease the font size.
Also I need to add a script in "setArabText2" block in order to highlight the sentence when just I click on it by using span.

I need to join two scripts together one script is for increasing and decreasing the font size and other script is for clicking any sentence to highlight it.

Please help me.