Javascript in custom button

Question

I created a custom button with the send email features, so if the margin<0.4) show alert, than can't send the email. I created the button but it doesn't work.

Somebody can help me?

{!REQUIRESCRIPT("/soap/ajax/22.0/connection.js")}

var criteria1 = "SELECT id FROM OpportunityLineItem WHERE margin__c < 0.4 limit 1";

 records = sforce.connection.query(criteria1);

 records1 = records.getArray("records");

if(records1.length > 0){  
  alert("Before send email need approva process");
} else {
  location.replace('/email/author/emailauthor.jsp?retURL=/{!Opportunity.Id}&p3_lkid={!Opportunity.Id}&rtype=003&&p24=b@b.com&template_id=0000000000000&new_template=true ');
}

catch(e){
  alert('An Error Occured' +e)
}

Answer 1

I think you could be missing a file {!REQUIRESCRIPT("/soap/ajax/22.0/apex.js" )}. You add this file in your javascript, It will work.