Here's a common scenario: you want to allow your visitors to search for articles within the states of their choice, multiple-choice. Here's an example search form you can use:
<form action="search.php?action=filter&filled=1&whichtype=links" method="post">
<p>Choose the states you want to search in:</p>
<table>
<tr>
<td valign="top">
<input type="hidden" name="statecondition" value="or" >
<input type="checkbox" name="statesearch[]" value="select all" onclick="checkuncheckstates()" > All States<br >
<input type="checkbox" name="statedirectoriessearch[]" value="Alabama" > Alabama<br ><input type="checkbox" name="statedirectoriessearch[]" value="Alaska" > Alaska<br ><input type="checkbox" name="statedirectoriessearch[]" value="American Samoa" > American Samoa<br ><input type="checkbox" name="statedirectoriessearch[]" value="Arizona" > Arizona<br ><input type="checkbox" name="statedirectoriessearch[]" value="Arkansas" > Arkansas<br ><input type="checkbox" name="statedirectoriessearch[]" value="California" > California<br ><input type="checkbox" name="statedirectoriessearch[]" value="Colorado" > Colorado<br ><input type="checkbox" name="statedirectoriessearch[]" value="Connecticut" > Connecticut<br ><input type="checkbox" name="statedirectoriessearch[]" value="Delaware" > Delaware<br ><input type="checkbox" name="statedirectoriessearch[]" value="District Of Columbia" > District Of Columbia<br ><input type="checkbox" name="statedirectoriessearch[]" value="Federated States Of Micronesia" > Federated States Of Micronesia<br ></td><td valign="top"><input type="checkbox" name="statedirectoriessearch[]" value="Florida" > Florida<br ><input type="checkbox" name="statedirectoriessearch[]" value="Georgia" > Georgia<br ><input type="checkbox" name="statedirectoriessearch[]" value="Guam" > Guam<br ><input type="checkbox" name="statedirectoriessearch[]" value="Hawaii" > Hawaii<br ><input type="checkbox" name="statedirectoriessearch[]" value="Idaho" > Idaho<br ><input type="checkbox" name="statedirectoriessearch[]" value="Illinois" > Illinois<br ><input type="checkbox" name="statedirectoriessearch[]" value="Indiana" > Indiana<br ><input type="checkbox" name="statedirectoriessearch[]" value="Iowa" > Iowa<br ><input type="checkbox" name="statedirectoriessearch[]" value="Kansas" > Kansas<br ><input type="checkbox" name="statedirectoriessearch[]" value="Kentucky" > Kentucky<br ></td><td valign="top"><input type="checkbox" name="statedirectoriessearch[]" value="Louisiana" > Louisiana<br ><input type="checkbox" name="statedirectoriessearch[]" value="Maine" > Maine<br ><input type="checkbox" name="statedirectoriessearch[]" value="Marshall Islands" > Marshall Islands<br ><input type="checkbox" name="statedirectoriessearch[]" value="Maryland" > Maryland<br ><input type="checkbox" name="statedirectoriessearch[]" value="Massachusetts" > Massachusetts<br ><input type="checkbox" name="statedirectoriessearch[]" value="Michigan" > Michigan<br ><input type="checkbox" name="statedirectoriessearch[]" value="Minnesota" > Minnesota<br ><input type="checkbox" name="statedirectoriessearch[]" value="Mississippi" > Mississippi<br ><input type="checkbox" name="statedirectoriessearch[]" value="Missouri" > Missouri<br ><input type="checkbox" name="statedirectoriessearch[]" value="Montana" > Montana<br ></td><td valign="top"><input type="checkbox" name="statedirectoriessearch[]" value="Nebraska" > Nebraska<br ><input type="checkbox" name="statedirectoriessearch[]" value="Nevada" > Nevada<br ><input type="checkbox" name="statedirectoriessearch[]" value="New Hampshire" > New Hampshire<br ><input type="checkbox" name="statedirectoriessearch[]" value="New Jersey" > New Jersey<br ><input type="checkbox" name="statedirectoriessearch[]" value="New Mexico" > New Mexico<br ><input type="checkbox" name="statedirectoriessearch[]" value="New York" > New York<br ><input type="checkbox" name="statedirectoriessearch[]" value="North Carolina" > North Carolina<br ><input type="checkbox" name="statedirectoriessearch[]" value="North Dakota" > North Dakota<br ><input type="checkbox" name="statedirectoriessearch[]" value="Northern Mariana Islands" > Northern Mariana Islands<br ><input type="checkbox" name="statedirectoriessearch[]" value="Ohio" > Ohio<br ></td><td valign="top"><input type="checkbox" name="statedirectoriessearch[]" value="Oklahoma" > Oklahoma<br ><input type="checkbox" name="statedirectoriessearch[]" value="Oregon" > Oregon<br ><input type="checkbox" name="statedirectoriessearch[]" value="Palau" > Palau<br ><input type="checkbox" name="statedirectoriessearch[]" value="Pennsylvania" > Pennsylvania<br ><input type="checkbox" name="statedirectoriessearch[]" value="Puerto Rico" > Puerto Rico<br ><input type="checkbox" name="statedirectoriessearch[]" value="Rhode Island" > Rhode Island<br ><input type="checkbox" name="statedirectoriessearch[]" value="South Carolina" > South Carolina<br ><input type="checkbox" name="statedirectoriessearch[]" value="South Dakota" > South Dakota<br ><input type="checkbox" name="statedirectoriessearch[]" value="Tennessee" > Tennessee<br ><input type="checkbox" name="statedirectoriessearch[]" value="Texas" > Texas<br ></td><td valign="top"><input type="checkbox" name="statedirectoriessearch[]" value="Utah" > Utah<br ><input type="checkbox" name="statedirectoriessearch[]" value="Vermont" > Vermont<br ><input type="checkbox" name="statedirectoriessearch[]" value="Virgin Islands" > Virgin Islands<br ><input type="checkbox" name="statedirectoriessearch[]" value="Virginia" > Virginia<br ><input type="checkbox" name="statedirectoriessearch[]" value="Washington" > Washington<br ><input type="checkbox" name="statedirectoriessearch[]" value="West Virginia" > West Virginia<br ><input type="checkbox" name="statedirectoriessearch[]" value="Wisconsin" > Wisconsin<br ><input type="checkbox" name="statedirectoriessearch[]" value="Wyoming" > Wyoming<br >
</td>
</tr>
</table>
<br >Search for articles where the name contains
<input type="hidden" name="titlecondition" value="like" >
<input type="text" size="{STANDARDSIZE}" name="titlesearch" >
<br ><br >
<br ><input type="submit" value="Run Search" class="button" >
</form>
<p>Choose the states you want to search in:</p>
<table>
<tr>
<td valign="top">
<input type="hidden" name="statecondition" value="or" >
<input type="checkbox" name="statesearch[]" value="select all" onclick="checkuncheckstates()" > All States<br >
<input type="checkbox" name="statedirectoriessearch[]" value="Alabama" > Alabama<br ><input type="checkbox" name="statedirectoriessearch[]" value="Alaska" > Alaska<br ><input type="checkbox" name="statedirectoriessearch[]" value="American Samoa" > American Samoa<br ><input type="checkbox" name="statedirectoriessearch[]" value="Arizona" > Arizona<br ><input type="checkbox" name="statedirectoriessearch[]" value="Arkansas" > Arkansas<br ><input type="checkbox" name="statedirectoriessearch[]" value="California" > California<br ><input type="checkbox" name="statedirectoriessearch[]" value="Colorado" > Colorado<br ><input type="checkbox" name="statedirectoriessearch[]" value="Connecticut" > Connecticut<br ><input type="checkbox" name="statedirectoriessearch[]" value="Delaware" > Delaware<br ><input type="checkbox" name="statedirectoriessearch[]" value="District Of Columbia" > District Of Columbia<br ><input type="checkbox" name="statedirectoriessearch[]" value="Federated States Of Micronesia" > Federated States Of Micronesia<br ></td><td valign="top"><input type="checkbox" name="statedirectoriessearch[]" value="Florida" > Florida<br ><input type="checkbox" name="statedirectoriessearch[]" value="Georgia" > Georgia<br ><input type="checkbox" name="statedirectoriessearch[]" value="Guam" > Guam<br ><input type="checkbox" name="statedirectoriessearch[]" value="Hawaii" > Hawaii<br ><input type="checkbox" name="statedirectoriessearch[]" value="Idaho" > Idaho<br ><input type="checkbox" name="statedirectoriessearch[]" value="Illinois" > Illinois<br ><input type="checkbox" name="statedirectoriessearch[]" value="Indiana" > Indiana<br ><input type="checkbox" name="statedirectoriessearch[]" value="Iowa" > Iowa<br ><input type="checkbox" name="statedirectoriessearch[]" value="Kansas" > Kansas<br ><input type="checkbox" name="statedirectoriessearch[]" value="Kentucky" > Kentucky<br ></td><td valign="top"><input type="checkbox" name="statedirectoriessearch[]" value="Louisiana" > Louisiana<br ><input type="checkbox" name="statedirectoriessearch[]" value="Maine" > Maine<br ><input type="checkbox" name="statedirectoriessearch[]" value="Marshall Islands" > Marshall Islands<br ><input type="checkbox" name="statedirectoriessearch[]" value="Maryland" > Maryland<br ><input type="checkbox" name="statedirectoriessearch[]" value="Massachusetts" > Massachusetts<br ><input type="checkbox" name="statedirectoriessearch[]" value="Michigan" > Michigan<br ><input type="checkbox" name="statedirectoriessearch[]" value="Minnesota" > Minnesota<br ><input type="checkbox" name="statedirectoriessearch[]" value="Mississippi" > Mississippi<br ><input type="checkbox" name="statedirectoriessearch[]" value="Missouri" > Missouri<br ><input type="checkbox" name="statedirectoriessearch[]" value="Montana" > Montana<br ></td><td valign="top"><input type="checkbox" name="statedirectoriessearch[]" value="Nebraska" > Nebraska<br ><input type="checkbox" name="statedirectoriessearch[]" value="Nevada" > Nevada<br ><input type="checkbox" name="statedirectoriessearch[]" value="New Hampshire" > New Hampshire<br ><input type="checkbox" name="statedirectoriessearch[]" value="New Jersey" > New Jersey<br ><input type="checkbox" name="statedirectoriessearch[]" value="New Mexico" > New Mexico<br ><input type="checkbox" name="statedirectoriessearch[]" value="New York" > New York<br ><input type="checkbox" name="statedirectoriessearch[]" value="North Carolina" > North Carolina<br ><input type="checkbox" name="statedirectoriessearch[]" value="North Dakota" > North Dakota<br ><input type="checkbox" name="statedirectoriessearch[]" value="Northern Mariana Islands" > Northern Mariana Islands<br ><input type="checkbox" name="statedirectoriessearch[]" value="Ohio" > Ohio<br ></td><td valign="top"><input type="checkbox" name="statedirectoriessearch[]" value="Oklahoma" > Oklahoma<br ><input type="checkbox" name="statedirectoriessearch[]" value="Oregon" > Oregon<br ><input type="checkbox" name="statedirectoriessearch[]" value="Palau" > Palau<br ><input type="checkbox" name="statedirectoriessearch[]" value="Pennsylvania" > Pennsylvania<br ><input type="checkbox" name="statedirectoriessearch[]" value="Puerto Rico" > Puerto Rico<br ><input type="checkbox" name="statedirectoriessearch[]" value="Rhode Island" > Rhode Island<br ><input type="checkbox" name="statedirectoriessearch[]" value="South Carolina" > South Carolina<br ><input type="checkbox" name="statedirectoriessearch[]" value="South Dakota" > South Dakota<br ><input type="checkbox" name="statedirectoriessearch[]" value="Tennessee" > Tennessee<br ><input type="checkbox" name="statedirectoriessearch[]" value="Texas" > Texas<br ></td><td valign="top"><input type="checkbox" name="statedirectoriessearch[]" value="Utah" > Utah<br ><input type="checkbox" name="statedirectoriessearch[]" value="Vermont" > Vermont<br ><input type="checkbox" name="statedirectoriessearch[]" value="Virgin Islands" > Virgin Islands<br ><input type="checkbox" name="statedirectoriessearch[]" value="Virginia" > Virginia<br ><input type="checkbox" name="statedirectoriessearch[]" value="Washington" > Washington<br ><input type="checkbox" name="statedirectoriessearch[]" value="West Virginia" > West Virginia<br ><input type="checkbox" name="statedirectoriessearch[]" value="Wisconsin" > Wisconsin<br ><input type="checkbox" name="statedirectoriessearch[]" value="Wyoming" > Wyoming<br >
</td>
</tr>
</table>
<br >Search for articles where the name contains
<input type="hidden" name="titlecondition" value="like" >
<input type="text" size="{STANDARDSIZE}" name="titlesearch" >
<br ><br >
<br ><input type="submit" value="Run Search" class="button" >
</form>
In Admin Panel -> Themes -> Manage Templates -> Extra Javascript Inclusions, insert this:
<script type="text/javascript">
function checkuncheckstates()
{
var boxes = document.getElementsByName('statedirectoriessearch[]');
for (i=1; i < boxes.length; i++)
{
if (boxes[i].checked == true) boxes[i].checked = false;
else boxes[i].checked = true;
}
}
</script>
This will display all the states (or provinces, depending on default country), 10 per column, with checkboxes and select all option.