want  to restrict validate() methid when i click save&exit

 in my application refresh ,save&exit and print butons are there

  when i click refresh ,save&exit and print butons when certains conditions met this checkLoadType() should call;

   but WHEN i click save&exit  alert message coming twice  because i have written this checkLoadType()  in validate() and setAction(obj);(but i want to fire once only)

validate() in form tag  also calling so i want  to restrict validate() when i click save&exit  

function setAction(obj)
{
      
                  if(!checkLoadType())
                  return false;

      if (obj=="SNE")
      {
            document.getElementById("NextOperation").value="Submit";
            document.getElementById("isSave").value="true";
            document.forms[0].submit();
            return true;
      }
}
function validate()
{

      
                  if(!checkLoadType())
                  return false;

            if('MHBL'=='FCR' && 'F' == 'F' && document.getElementById("NextOperation").value == 'Packs')
      {
            alert('Cannot enter item details for FCL shipment');
            return false;
      }


}

function checkLoadType()
{
var ary=document.getElementsByTagName("input");
var str="";

 for (var i=0;i<ary.length;i++){

     if (ary[i].type.toLowerCase()=="checkbox" && ary[i].checked==true){
         var obj=ary[i].parentNode;
         for(var j=0;j<15;j++){
            obj=obj.nextSibling;
               
        }
          var newStr=obj.innerText;
          str = str+newStr+',';
    }
}

                  var temp = str.split(',')
                  var code = temp[0]
                  for(i=0; i <temp.length-1;i++)
                  {

                              if(temp[i] != code)
                              {
                                    alert("Shipments of either LCL or FCL type can only be consolidted");
                                    return false;
                              }
                              
                  }

return true;
}

      <form method="post" action="FCRController" onSubmit='return validate()'>
  <input type="submit" name="SaveAndExit"  id="SaveAndExit"  value="Save & Exit" class='input' TABINDEX="101" onClick = "setAction('SNE')" >
        <input type="submit" name="Refresh"  id="Refresh"  value="Refresh" class='input' TABINDEX="100" >
            <input type="submit" name="ENTER"  id="ENTER"  value="ENTER" class='input' TABINDEX="100" >Start Free Trial