function preloader() 

{
     // counter
     var i = 0;
     // create object
     imageObj = new Image();

     // set image list
     images = new Array();
     images[0]="images/center-bill.jpg"
     images[1]="images/center-clients.jpg"
     images[2]="images/center-contact.jpg"
     images[3]="images/center-daniela.jpg"
     images[4]="images/center-joel.jpg"
     images[5]="images/center-search.jpg"
     
	 // start preloading
     for(i=0; i<=3; i++) 
     {
          imageObj.src=images[i];
     }

}