if(document.images)
 {
 <!-- about -->
 navmain_default_1=new Image();
 navmain_roll_1=new Image();
 <!-- find -->
 navmain_default_2=new Image();
 navmain_roll_2=new Image();
 <!-- contact -->
 navmain_default_3=new Image();
 navmain_roll_3=new Image();
 <!-- industry -->
 navmain_default_4=new Image();
 navmain_roll_4=new Image();
 <!-- home -->
 navmain_default_5=new Image();
 navmain_roll_5 =new Image();

life = "/";

 navmain_default_1.src=life+"images/navbar_about.png";
 navmain_roll_1.src= life+"images/navbar_about_over.png";

 navmain_default_2.src=life+"images/navbar_findSpeaker.png";
 navmain_roll_2.src=life+"images/navbar_findSpeaker_over.png";

 navmain_default_3.src=life+"images/navbar_contact.png";
 navmain_roll_3.src=life+"images/navbar_contact_over.png";
 navmain_default_4.src=life+"images/navbar_industryArticle.png";
 navmain_roll_4.src=life+"images/navbar_industryArticle_over.png";
 navmain_default_5.src=life+"images/navbar_home.png"; 
 navmain_roll_5.src=life+"images/navbar_home_over.png";


 navmain_default_6=new Image();
 navmain_roll_6=new Image();
 
 navmain_default_7=new Image();
 navmain_roll_7=new Image();
 
 navmain_default_8=new Image();
 navmain_roll_8=new Image();
 
 navmain_default_9=new Image();
 navmain_roll_9=new Image();
 
 navmain_default_10=new Image();
 navmain_roll_10 =new Image();
 
  navmain_default_11=new Image();
 navmain_roll_11=new Image();
 
 navmain_default_12=new Image();
 navmain_roll_12=new Image();
 
 navmain_default_13=new Image();
 navmain_roll_13 =new Image();
 
 navmain_default_14=new Image();
 navmain_roll_14=new Image();
 




 navmain_default_6.src=life+"images/speakInc_speaker1.png";
 navmain_roll_6.src=life+"images/speakInc_speaker1_rollover.png";

 navmain_default_7.src=life+"images/speakInc_speaker2.png";
 navmain_roll_7.src=life+"images/speakInc_speaker2_rollover.png";

 navmain_default_8.src=life+"images/speakInc_speaker3.png";
 navmain_roll_8.src=life+"images/speakInc_speaker3_rollover.png";
 
 navmain_default_9.src=life+"images/speakInc_speaker4.png";
 navmain_roll_9.src=life+"images/speakInc_speaker4_rollover.png";
 
 navmain_default_10.src=life+"images/speakInc_speaker5.png"; 
 navmain_roll_10.src=life+"images/speakInc_speaker5_rollover.png";

 navmain_default_11.src=life+"images/speakInc_speaker6.png";
 navmain_roll_11.src=life+"images/speakInc_speaker6_rollover.png";
 
 navmain_default_12.src=life+"images/speakInc_speaker7.png";
 navmain_roll_12.src=life+"images/speakInc_speaker7_rollover.png";
 
 navmain_default_13.src=life+"images/speakInc_speaker8.png"; 
 navmain_roll_13.src=life+"images/speakInc_speaker8_rollover.png";
 
 navmain_default_14.src=life+"images/speakInc_speaker9.png"; 
 navmain_roll_14.src=life+"images/speakInc_speaker9_rollover.png";

 }