Title: Next Java-Script Error
Last modified: February 14, 2020

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# Next Java-Script Error

 *  Resolved [kkbildung](https://wordpress.org/support/users/kkbildung/)
 * (@kkbildung)
 * [6 years, 3 months ago](https://wordpress.org/support/topic/next-java-script-error/)
 * Dear Jules,
 * thank you for the great plugin. Everthing works fine.. untill today. One of our
   customers called me today, that they can’t fill out the booking for one of our
   courses. There is one field missing – but only on IE 11 – google chrome end firefox
   working fine!
 * Every bookingpage is build with CF7 and your Plugin. Conditional fields help 
   me to make the site not so big – First the customer has to indicate how many 
   participants should be registered. Depending on the number, input fields for 
   participant information then open. This field is completely missing in Internet
   Explorer, so that an online booking is not possible.
 * In the IE console the error is:
    Script5007: The “contains” property of an undefined
   or null reference cannot be obtained. scripts.js (730,7)
 * I have read some topics here, so i deactivated wp rocked (caching plugin) but
   nothing happens. Do you have any ideas? I wouldn’t write to you, but 50 % of 
   our customers are still using IE. Please, can you help me? Thank you and greetings
   from germany!
 * Christin
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fnext-java-script-error%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Plugin Author [Jules Colle](https://wordpress.org/support/users/jules-colle/)
 * (@jules-colle)
 * [6 years, 3 months ago](https://wordpress.org/support/topic/next-java-script-error/#post-12438674)
 * Ah, I tried using my plugin with the material design plugin, and there are some
   problems in compatibility. Are you by any chance using that plugin? if so, could
   you check if problem occurs if you disable the material design plugin?
 *  Thread Starter [kkbildung](https://wordpress.org/support/users/kkbildung/)
 * (@kkbildung)
 * [6 years, 3 months ago](https://wordpress.org/support/topic/next-java-script-error/#post-12472742)
 * Dear Jules,
 * thank you for your answer. I was on holiday. But today I have checked it and 
   yes – we also use the Material Design plugin. I deactivated it and you are right,
   the problem no longer exists. Unfortunately I used it for all bookings (More 
   than 30) … without the plugin it looks very ugly. Is there any way to find the
   error when using both plugins?
 *  Plugin Author [Jules Colle](https://wordpress.org/support/users/jules-colle/)
 * (@jules-colle)
 * [6 years, 3 months ago](https://wordpress.org/support/topic/next-java-script-error/#post-12517329)
 * I kind of gave up on this, sorry. I had material design installed for one of 
   my own projects, even purchased the pro lifetime license, but eventually gave
   up and created my own material stylesheet.

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘Next Java-Script Error’ is closed to new replies.

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## Tags

 * [javascript](https://wordpress.org/support/topic-tag/javascript/)

 * 3 replies
 * 2 participants
 * Last reply from: [Jules Colle](https://wordpress.org/support/users/jules-colle/)
 * Last activity: [6 years, 3 months ago](https://wordpress.org/support/topic/next-java-script-error/#post-12517329)
 * Status: resolved