var price = new Array(); 
price[0] = "";
price[1] = "3.50";
price[2] = "7.00";
price[3] = "10.00";
price[4] = "15.00";
price[5] = "22.00";

$(document).ready(function(){
    $("#choose_size").change(function(){ 

		var price_index;
		price_index = $("#choose_size").val(); 
		$("#price_display").empty(); 

		if (price_index > 0){
			$("#price_display").attr("value", price[price_index]);
			//$("#price_display").val = price[price_index];
		}
		else{
			$("#price_display").attr("value", "");
		}
	});
	/*
	$('#choose_size').change(function(){
		$('#price_display').val = 'whore';
	});
	*/
});