jquery hide if select show if else

Hello,

I want to make is to that if the select 'Land' is chosen then it hides the bottom div "propForm" if it is not chosen then I want it to show of everyone else.

Thanks for your help,
Matt

<select class="input2" name="listing_type" id="lt">
<option value="For+Sale">For Sale</option>
<option value="For+Rent">For Rent</option>
</select></label><br /><br />

<span id="boxes2">
<span id="For+Rent">
<label>Property Type<span style="color:#F50">*</span><br />
<select class="input2" name="property_type" id="pt">
<option value="Condo / Townhome">Condo / Townhome</option>
<option value="Single Family">Single Family</option>
<option value="Mobile Home">Mobile Home</option>
</select></label>
</span>

<span id="For+Sale">
<label>Property Type<span style="color:#F50">*</span><br />
<select class="input2" name="property_type" id="pt">
<option value="Condo / Townhome">Condo / Townhome</option>
<option value="Single Family">Single Family</option>
<option value="Multi Family">Multi Family</option>
<option value="Mobile Home">Mobile Home</option>
<option value="Land">Land</option>
</select></label>
</span>
</span>

<script type="text/javascript">

$("#lt").change(function(){
      $("#boxes2").children("span").hide();
      $("span[id*='" + this.value + "']").show();
});
$("#lt").change();

</script>

<span id="formDiv">
<span id="propForm">
HIDE IF LAND IS SELECTED
</span>
</span>

<script type="text/javascript">

$("#pt").change(function(){
      $("#formDiv").children("span").hide();
      $("span[id*='" + this.value + "']").show();
});
$("#pt").change();

</script>

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