Bug when using images instead of "already voted" text

I am experiencing trouble with the plugin when using custom images for two-way voting and another custom image to display once voted. That last image displays correctly but now links to Upvote or Downvote are broken due to incorrect javascript code. Here’s the source code:

<span class="votelink" id="voteid1374"><a href="javascript:vote('votecount1374','voteid1374','<img src="http://post.gradus.org/wp-content/plugins/vote-it-up/voted.jpg" />',1374,2,'http://post.gradus.org/wp-content/plugins/vote-it-up');"><img src="http://post.gradus.org/wp-content/plugins/vote-it-up/voteup.jpg" /></a><a href="javascript:sink('votecount1374','voteid1374','<img src="http://post.gradus.org/wp-content/plugins/vote-it-up/voted.jpg" />',1374,2,'http://post.gradus.org/wp-content/plugins/vote-it-up');"><img src="http://post.gradus.org/wp-content/plugins/vote-it-up/votedown.jpg" /></a></span>

voteup and votedown.jpg are up – down vote buttons and voted.jpg is the image displayed once voted. I am guessing there should not be an img src code within the javascript bracket but not sure how to fix this as I am not a coder. Please help. Thanks!

http://wordpress.org/extend/plugins/vote-it-up/