Title: wp_head() causes javascript errors. Last modified: August 19, 2016 --- # wp_head() causes javascript errors. * [teddyknox](https://wordpress.org/support/users/teddyknox/) * (@teddyknox) * [16 years, 6 months ago](https://wordpress.org/support/topic/wp_head-causes-javascript-errors/) * Hi, On my blog I have a javascript slider, which I wrote with mootools. It worked when wp_head() was commented out, but now that I want to use the next gen gallery plugin, I need to uncomment it. And so, when I load my page now, many mootools errors come up and the javascript slider doesn’t work, but the flash nextgen gallery does. Does anybody have any idea why wp_head() would have an adverse effect on the javascript? Thankyou! Viewing 5 replies - 1 through 5 (of 5 total) * [s_ha_dum](https://wordpress.org/support/users/apljdi/) * (@apljdi) * [16 years, 6 months ago](https://wordpress.org/support/topic/wp_head-causes-javascript-errors/#post-1299761) * > Does anybody have any idea why wp_head() would have an adverse effect on the > javascript? * Because its loading bad javascript. By itself, [wp_head()](http://codex.wordpress.org/Plugin_API/Action_Reference/wp_head) doesn’t do much of anything. What it does do is load code into the `` section of the document _if_ told to do so. The problem isn’t with wp_head(), its with something that wp_head has been told to load. Exactly what its loading I can’t tell from the information you’ve given. An URL would help though. * Thread Starter [teddyknox](https://wordpress.org/support/users/teddyknox/) * (@teddyknox) * [16 years, 6 months ago](https://wordpress.org/support/topic/wp_head-causes-javascript-errors/#post-1299954) * Thanks, * [http://www.theblackandwhite.net](http://www.theblackandwhite.net) * [Jared Atchison](https://wordpress.org/support/users/jaredatch/) * (@jaredatch) * [16 years, 6 months ago](https://wordpress.org/support/topic/wp_head-causes-javascript-errors/#post-1299960) * Works for me with no errors – FF 3.5 Mac * [s_ha_dum](https://wordpress.org/support/users/apljdi/) * (@apljdi) * [16 years, 6 months ago](https://wordpress.org/support/topic/wp_head-causes-javascript-errors/#post-1299962) * Several different javascript files are triggering errors. Disable all of the scripts then start putting them back one by one making sure things work before moving on. It would help a lot if you get Firefox, install Firebug, load the page, and enable Firebug for the page. * [Gerald Yeo](https://wordpress.org/support/users/geraldyeo/) * (@geraldyeo) * [16 years, 6 months ago](https://wordpress.org/support/topic/wp_head-causes-javascript-errors/#post-1299978) * A guess would be that since next gen gallery loads jQuery. With MooTools loaded, it may cause a conflict in the usage of $, even though jQuery is set to no-conflict. * Try switching the $ sign in your MooTools dependent JavaScript with document. id * This is to trigger MooTools’ Dollar Safe Mode. [http://mootools.net/blog/2009/06/22/the-dollar-safe-mode/](http://mootools.net/blog/2009/06/22/the-dollar-safe-mode/) Viewing 5 replies - 1 through 5 (of 5 total) The topic ‘wp_head() causes javascript errors.’ is closed to new replies. * 5 replies * 4 participants * Last reply from: [Gerald Yeo](https://wordpress.org/support/users/geraldyeo/) * Last activity: [16 years, 6 months ago](https://wordpress.org/support/topic/wp_head-causes-javascript-errors/#post-1299978) * Status: not resolved ## Topics ### Topics with no replies ### Non-support topics ### Resolved topics ### Unresolved topics ### All topics