调整multiselect宽度

$('#example-enableCollapsibleOptGroups-collapsed').multiselect({
buttonWidth: '400px',
enableClickableOptGroups: true,
enableCollapsibleOptGroups: true,
buttonContainer: '

',

});
$('.dropdown-menu').css('width', '400px');


$('#example-enableCollapsibleOptGroups-collapsed-container .caret').click();
$('#example-enableCollapsibleOptGroups-collapsed-container').click();