I wrote the following Visualforce page to be used on our asset object.  It works as designed, but the records that are retruned are in a random order.  So two questions in reguard to this;

• First, what determines the sort order of the dataTable tag?
• Second, is there an attribute or command that I can use to specify which field is used to sort the data in the dataTable?

 <apex: page standardController="Company_Asset__c" standardStylesheets="true" standardStylesheets="true">

   <apex:dataTable value="{!Company_Asset__c.Loaner_Instruments__r}" var="LDI"  
         style="font-family:Arial,helvetica,sans-serif" style="font-size:11px" bgcolor="#F3F3fC" >
         

         <apex:column width="25"  rendered="{!Company_Asset__c.Loaner__c}" >
         </apex:column>
         <apex:column width="85"  rendered="{!Company_Asset__c.Loaner__c}" >{!LDI.Name} </apex:column>
         <apex:column width="60"  rendered="{!Company_Asset__c.Loaner__c}" style="color:red" >

                 <b>Status:</b> 

         </apex:column>
         <apex:column width="150" rendered="{!Company_Asset__c.Loaner__c}">
                   {!IF(Contains(LDI.Instrument_Status__c,"flag_red.gif" ), "Checked Out   "  ,"Checked In   " )}
         </apex:column>
         <apex:column width="150" rendered="{!Company_Asset__c.Loaner__c}" >

                  <b>Loaner Returned Date:</b>   

         </apex:column>
         <apex:column width="150" value="{!LDI.Loaner_Returned_Date__c}"

                     rendered="{!Company_Asset__c.Loaner__c}">
         </apex:column>
         <apex:column width="120" rendered="{!Company_Asset__c.Loaner__c}" style="color:green">

                    <b>Trade Show Ready:</b>
         </apex:column>
         <apex:column width="15" value="{!LDI.Inspected__c}" rendered="{!Company_Asset__c.Loaner__c}">
         </apex:column>
         <apex:column width="100"  rendered="{!Company_Asset__c.Loaner__c}">
         </apex:column>
    </apex:dataTable>
</apex: page>

Any help would be appreciated.