List Box with multiple option expands <div>

[Claus Mygind]

I have a <div> which defines my menu bar. I would like for this <div> to stay fixed.

On the menu bar I have a list box.

When the list box is set for single selection, the drop down list of selections, drop below the division.

When I include the "multiple" option on the list box, the list box expands the <div> to the size of the list box's available options.

How can I prevent this from happening? Below is my HTML and css code.

the css code
 
#MenuBar {
    position: fixed; 
    white-space: nowrap; 
    top: 0px; 
    left: 1px; 
    width: 99%;
    background-color: #CCFFFF; 
    color: black;
    border: #0000FF solid 1px;
    padding-left: 10px;
    z-index: 150;
}
 
the HTML code
 
<div id="MenuBar" nowrap="nowrap">
    &nbsp;Soil Samples
    &nbsp;&nbsp;Job#
    <input 
        type="text"
        id="JOBID" 
        name="JOBID" 
        size="7" 
        maxlength="6"
    />
    &nbsp;
    <input 
        type="button" 
        value="Find Borings"
        onclick="getBoringData();"
    />
    &nbsp;&nbsp;Select Boring#
    <select 
        id="BORING" 
        name="BORING"
        multiple="multiple"
    >
        <option value="all" selected>Select</option>
        <option value="1"   selected>1</option>
        <option value="2"   selected>2</option>
        <option value="3"   selected>3</option>
        <option value="4"   selected>4</option>
        <option value="5"   selected>5</option>
        <option value="6"   selected>6</option>
        <option value="7"   selected>7</option>
        <option value="8"   selected>8</option>
        <option value="9"   selected>9</option>
        <option value="10"  selected>10</option>
        <option value="11"  selected>11</option>
        <option value="12"  selected>12</option>
        <option value="13"  selected>13</option>
        <option value="14"  selected>14</option>
    </select>
</div>                                                                                      
 
 
 

[drhowarddrfine]

Try floating the drop down.