Issue in javascript in PreSaveAction within a newform.aspx

hi,

am facing issue when writing validation of javascript functions within a  content editor of my customnewform.aspx file of my SP 2010 SPList.

am having few textfields, number fields, dropdown choice fields for validation. 

business rule #1:

 When a  dropdown item == 'ABC' , i need to  have the below text boxes and number  fields as mandatory fields else they are optional.

my js logic :

 function PreSaveAction()
 {

var dt3;
var dt4;
var dt5;
var dt6OralsDate;
var oralsdatethrusputility;
var dt7likelyStartDate;
var dt8dealResultDate;
var liklyStrtDatethrusputility;
var estimatedsizein;
var flagGeneric =true;

var opportunityidthrusputility;

//alert("inside presaveaction ..........");

opportunityidthrusputility = SPUtility.GetSPField('Opportunity ID').GetValue(); 

var opportunityTypethrusputility = SPUtility.GetSPField('Opportunity Type').GetValue(); 

//alert(opportunityTypethrusputility + '== is the opportunity type');

var valofestimatedsizeforEASORA = SPUtility.GetSPField('Estimated size (In KUSD)').GetValue();

var valDurationinMonths = SPUtility.GetSPField('Duration (in Months)').GetValue();

//alert(valDurationinMonths + ' == Oct 15 is the Duration in Months ');

if(opportunityTypethrusputility == 'ABC')
{

 alert(valofestimatedsizeforEASORA + ' === Oct 15 within rfp if ...condition oct 15 for estimated size for Field' );

  if(valofestimatedsizeforEASORA == null || valofestimatedsizeforEASORA.trim() =="")
  {
     flagGeneric = false;
 alert('Estimated size for EAS ORC field is mandatory going 2 focus ');
     alert(flagGeneric + ' ==is the flaggeneric value');
     $("input[title='Estimated size (In KUSD)']").focus();
  }

  alert(' start the if condition for chking for duration in months field' );
  alert(valDurationinMonths + '== is the duration value within  condition ');

 if(valDurationinMonths == null || valDurationinMonths.trim() =="")
 {
     flagGeneric = false;
     alert('duration in months is mandatory on Oct 15 ');
 }

}
alert(flagGeneric + ' == for overall flagg');

 if(flagGeneric == false)
 {
  alert('please fill mandatory fields');
  return false;
 }
 else
 {
 alert(' flagGeneric is true ');
 }

here