How can i disable some item in optgroup
<p><strong>How can i disable some item in optgroup</strong></p>

<p>i want to disable "--Pick Up--" and "--All locations--" i am using drorpdwon </p>

<pre><code>&lt;select name="ddlpickuplocation" id="ddlpickuplocation" tabindex="1" class="width320"&gt;
&lt;optgroup label="california"&gt;
&lt;option value="--Pick Up--"&gt;--Pick Up--&lt;/option&gt;
&lt;option value="LOS ANGELES AIRPORT  (LAX)"&gt;LOS ANGELES AIRPORT  (LAX)&lt;/option&gt;
&lt;option value="SAN DIEGO AIRPORT  (SAN)"&gt;SAN DIEGO AIRPORT  (SAN)&lt;/option&gt;
&lt;option value="SAN FRANCISCO AIRPORT  (SFO)"&gt;SAN FRANCISCO AIRPORT  (SFO)&lt;/option&gt;
&lt;option value="--All locations--"&gt;--All locations--&lt;/option&gt;
&lt;option value="ANAHEIM DOWNTOWN"&gt;ANAHEIM DOWNTOWN&lt;/option&gt;
&lt;option value="BATON ROUGE INTERNATIONAL AIRPORT"&gt;BATON ROUGE INTERNATIONAL AIRPORT&lt;/option&gt;
&lt;option value="BERKELEY DOWNTOWN"&gt;BERKELEY DOWNTOWN&lt;/option&gt;
&lt;option value="SAN JOSE AIRPORT"&gt;SAN JOSE AIRPORT&lt;/option&gt;
&lt;option value="SANTA BARBARA AIRPORT"&gt;SANTA BARBARA AIRPORT&lt;/option&gt;
&lt;/optgroup&gt;
&lt;optgroup label="florida"&gt;
&lt;option value="BOCA RATON AIRPORT"&gt;BOCA RATON AIRPORT&lt;/option&gt;
&lt;option value="CLEARWATER AIRPORT"&gt;CLEARWATER AIRPORT&lt;/option&gt;
&lt;option value="DAYTONA AIRPORT"&gt;DAYTONA AIRPORT&lt;/option&gt;

&lt;/optgroup&gt;


&lt;/optgroup&gt;
&lt;optgroup label="rest of usa"&gt;
&lt;option value="--Pick Up--"&gt;--Pick Up--&lt;/option&gt;
&lt;option value="CHICAGO OHARE AIRPORT  (ORD)"&gt;CHICAGO OHARE AIRPORT  (ORD)&lt;/option&gt;
&lt;option value="--All locations--"&gt;--All locations--&lt;/option&gt;
&lt;option value="AKRON AIRPORT"&gt;AKRON AIRPORT&lt;/option&gt;
&lt;option value="ALLENTOWN AIRPORT"&gt;ALLENTOWN AIRPORT&lt;/option&gt;
&lt;option value="ALLENTOWN DOWNTOWN"&gt;ALLENTOWN DOWNTOWN&lt;/option&gt;
&lt;option value="AMARILLO AIRPORT"&gt;AMARILLO AIRPORT&lt;/option&gt;
&lt;option value="ANCHORAGE AIRPORT"&gt;ANCHORAGE AIRPORT&lt;/option&gt;
&lt;option value="ANDERSON DOWNTOWN"&gt;ANDERSON DOWNTOWN&lt;/option&gt;
&lt;option value="APPLETON AIRPORT"&gt;APPLETON AIRPORT&lt;/option&gt;
&lt;option value="ARKANUS AIRPORT"&gt;ARKANUS AIRPORT&lt;/option&gt;
&lt;option value="ATLANTA AIRPORT"&gt;ATLANTA AIRPORT&lt;/option&gt;
&lt;/optgroup&gt;
&lt;optgroup label="western usa"&gt;
&lt;option value="ALBUQUERQUE AIRPORT"&gt;ALBUQUERQUE AIRPORT&lt;/option&gt;
&lt;option value="ASPEN AIRPORT"&gt;ASPEN AIRPORT&lt;/option&gt;

&lt;/optgroup&gt;
</code></pre>

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