问如何更改下拉菜单的样式

EN

<tr><td class="fieldlabel">{$LANG.clientareafirstname}</td><td class="fieldarea">{if $loggedin}{$clientsdetails.firstname}{else}<input type="text" name="firstname" tabindex="1" style="width:300px;" value="{$clientsdetails.firstname}" />{/if}</td><td class="fieldlabel">{$LANG.clientareaaddress1}</td><td class="fieldarea">{if $loggedin}{$clientsdetails.address1}{else}<input type="text" name="address1" tabindex="7" style="width:300px;" value="{$clientsdetails.address1}" />{/if}</td></tr>
<tr><td class="fieldlabel">{$LANG.clientarealastname}</td><td class="fieldarea">{if $loggedin}{$clientsdetails.lastname}{else}<input type="text" name="lastname" tabindex="2" style="width:300px;" value="{$clientsdetails.lastname}" />{/if}</td><td class="fieldlabel">{$LANG.clientareaaddress2}</td><td class="fieldarea">{if $loggedin}{$clientsdetails.address2}{else}<input type="text" name="address2" tabindex="8" style="width:300px;" value="{$clientsdetails.address2}" />{/if}</td></tr>
<tr><td class="fieldlabel">{$LANG.clientareacompanyname}</td><td class="fieldarea">{if $loggedin}{$clientsdetails.companyname}{else}<input type="text" name="companyname" tabindex="3" style="width:300px;" value="{$clientsdetails.companyname}" />{/if}</td><td class="fieldlabel">{$LANG.clientareacity}</td><td class="fieldarea">{if $loggedin}{$clientsdetails.city}{else}<input type="text" name="city" tabindex="9" style="width:300px;" value="{$clientsdetails.city}" />{/if}</td></tr>
<tr><td class="fieldlabel">{$LANG.clientareaemail}</td><td class="fieldarea">{if $loggedin}{$clientsdetails.email}{else}<input type="text" name="email" tabindex="4" style="width:300px;" value="{$clientsdetails.email}" />{/if}</td><td class="fieldlabel">{$LANG.clientareastate}</td><td class="fieldarea">{if $loggedin}{$clientsdetails.state}{else}<input type="text" name="state" tabindex="10" style="width:300px;" value="{$clientsdetails.state}" />{/if}</td></tr>
<tr>{if !$loggedin}<td class="fieldlabel">{$LANG.clientareapassword}</td><td class="fieldarea"><input type="password" name="password" tabindex="5" id="newpw" style="width:300px;" value="{$password}" /></td>{else}<td class="fieldlabel"></td><td class="fieldarea"></td>{/if}<td class="fieldlabel">{$LANG.clientareapostcode}</td><td class="fieldarea">{if $loggedin}{$clientsdetails.postcode}{else}<input type="text" name="postcode" tabindex="11" style="width:300px;" value="{$clientsdetails.postcode}" />{/if}</td></tr>
<tr>{if !$loggedin}<td class="fieldlabel">{$LANG.clientareaconfirmpassword}</td><td class="fieldarea"><input type="password" name="password2" tabindex="6" style="width:300px;" value="{$password2}" /></td>{else}<td class="fieldlabel"></td><td class="fieldarea"></td>{/if}<td class="fieldlabel">{$LANG.clientareacountry}</td><td class="fieldarea">{if $loggedin}{$clientsdetails.country}{else}{$clientcountrydropdown|replace:'<select':'<select tabindex="12" style="width:285px;"'}{/if}</td></tr>
<tr><td colspan="2" class="fieldarea">{if !$loggedin}<script language="javascript">showStrengthBar();</script>{/if}</td><td class="fieldlabel">{$LANG.clientareaphonenumber}</td><td class="fieldarea">{if $loggedin}{$clientsdetails.phonenumber}{else}<input type="text" name="phonenumber" tabindex="13" style="width:300px;" value="{$clientsdetails.phonenumber}" />{/if}</td></tr>

<td class="fieldlabel">{$LANG.clientareacountry}</td><td class="fieldarea">{if $loggedin}{$clientsdetails.country}{else}{$clientcountrydropdown|replace:'<select':'<select tabindex="12" style="width:285px;"'}{/if}</td>

<td class="fieldlabel">{$LANG.clientareastate}</td><td class="fieldarea">{if $loggedin}{$clientsdetails.state}{else}<input type="text" name="state" tabindex="10" style="width:300px;" value="{$clientsdetails.state}" />{/if}</td>