javascript function of automatic dialing on android phone.

[발간실]

Employee's phone book is changed to pdf document and used on Android phone.
I want to make an automatic call when I click on a phone number.
What can I do?
You can enter 'tel: 010-1234-1234' in the url field of some functions.
If the number is more than 100, the above method is inconvenient.
Automatically fixes the employee's phone book
I need a javascript form to make a call.

[try67 · Accepted solution]

Don't put any hyphens in the number. It needs to be just digits. Also,

don't put a space after "tel:".