app/views/reports/_show.html.erb
<div id="report_<%= @report.id %>"
onmouseover="$('#report_<%= @report.id %>_delete_link').show();"
onmouseout="$('#report_<%= @report.id %>_delete_link').hide();"
style="line-height:25px">
<span id="report_<%= @report.id %>_name">
<%= render partial: 'reports/name' %>
</span>
</div>