function preloader(){
     // counter     var i = 0;
     // create object     
	 imageObj = new Image();
     // set image list     
	 images = new Array();     
	 images[0]="images/btn_accueil_over.jpg"     
	 images[1]="images/btn_bio_over.jpg"     
	 images[2]="images/btn_clinique_over.jpg"     
	 images[3]="images/btn_traitements_over.jpg"
	 images[4]="images/btn_faq_over.jpg"
	 images[5]="images/btn_contact_over.jpg"
	 //
	 images[6]="images/btn_accueil_out.jpg"     
	 images[7]="images/btn_bio_out.jpg"     
	 images[8]="images/btn_clinique_out.jpg"     
	 images[9]="images/btn_traitements_out.jpg"
	 images[10]="images/btn_faq_out.jpg"
	 images[11]="images/btn_contact_out.jpg"
     // start preloading     
	 for(i=0; i<=11; i++)      {          
	 	imageObj.src=images[i];     
	 }

} 
preloader()