function preloader() 
{
     // counter     
	 var i = 0;
     // create object     
	 imageObj = new Image();
     // set image list     
	 images = new Array();     
	 images[0]="./images/nav_01.jpg"     
	 images[1]="./images/nav_02.jpg"     
	 images[2]="./images/nav_03.jpg"     
	 images[3]="./images/nav_04.jpg"
	 images[4]="./images/nav_05.jpg"
	 images[5]="./images/nav_06.jpg"
	 images[6]="./images/submitreferral.jpg"
	 images[7]="./images/submitreferral_hover.jpg"
	 
     // start preloading     
	 for(i=0; i<=7; i++)      
	 {          
	 imageObj.src=images[i];     
	 }
}