$(document).ready( function () { 	
  
 
	showtab(1);
	
   
} ) ; 


function showtab(index){
		$(".tab-product-content").children().hide();
		$(".tab-product-content div:nth-child("+index+")").fadeIn('slow');
		
		$(".tab-product-onglets").children().removeClass('selected');
		$(".tab-product-onglets li:nth-child("+index+")").addClass('selected');
}