Jquery-multiselect: a bug in ie6

When jquery-multiselect is used (a multi-choice control can be transformed from a drop-down box to a control with checkbox), the following is the normal case: it is like this in ie6:

The first bug can be solved by referring to 'png image opacity in ie6.

When debugging the Second bug, it was found that the height of the div with the background color was actually normal, not just a little bit. It looked like it was covered by the white background of the 'select all cancel' in it, in fact, they do not set the background. After setting a value for the div height, it becomes normal.

The most strange is the third bug. Only when the first option is mouse sliding, there is no background color. After debugging, it is also confirmed that the first option actually triggers the corresponding event. hover... class, js Code does not have any special processing on the first option, and no reference is found online. Download the official website demo and run it in ie6.

Trying. hover... class to change the border color to the eye-catching red, found that when the mouse slides out of date except the first option did not see the red border, other options look only the left border is red, as shown below, so I guess it is because it thinks the width is 0. hover... class to add a width value, and then try width: 100%; is also normal. The solution is fine.