drwpow

{!REQUIRESCRIPT("/soap/ajax/29.0/connection.js")} 

var updateClientApproval = [];
var result = sforce.connection.query("SELECT Id, Create_Client_Approval__c FROM Order__c where Opportunity__c = '{!Opportunity__c.Id}' ");
var records = result.getArray("records"); 

var i = 0;
for (i; i < records.length ; i++) {
  var child = result.records[i];
  child.Create_Client_Approval__c = true;