getcart = function(action,it,size){
		var answer = confirm("Add this item to your cart ?")
	if (answer){
	
    
    
    var pars = {action:action,item:it,size:size};	
		
	
	var url = 'headers/header_cart.php';
	
    jQuery("#cartheader").load(url,pars);
    //	var pars = 'action='+action+'&item='+it+'&size='+size;
		/*
		var myAjax = new Ajax.Updater(
			'cartheader', 
			url, 
			{
				method: 'get', 
				parameters: pars,
				onComplete: addingComp
			});
		}
        */
	}else{
		
	}
}

addingComp = function(){
	//alert('This item was added to your cart');	
}
<!-- 
<!-- 
 -->