Need multiple options displayed on check out page

[alinart]

When items are added to the cart... only the first option (no matter which one it is) displays on checkout. 
I'm using just a simple javascript integration for paypal. No PHP. 

When the customer checks out, there is no indication of what size or color they chose despite having those options available. How can I get more than just the first option to display? I tried adding the option variables that I found in the developers section of paypal but it didn't work.

This is the code on the item page

<select class="item_size">
    <option value="S"> S </option>
    <option value="M"> M </option>
    <option value="L"> L </option>
    <option value="XL"> XL </option>
    <option value="XXL"> XXL </option>
  </select>
  &nbsp;
<select class="item_color">
    <option value="Blk/Wht"> Black/White </option>
    <option value="Nvy/Pfc"> Navy/Pacific </option>
  </select>
  &nbsp;
<input value="1" class="item_Quantity" type="text" size="3">
<input type="hidden" class="item_id" value="M1001"> </form>
 &nbsp;
 <span class="item_price">$78.00</span>

 and this is part of the code in my javascript

this.paypalCheckout = function() {
		
		var winpar = "scrollbars,location,resizable,status",
			strn  = "https://www.paypal.com/cgi-bin/webscr?cmd=_cart" +
		   			"&upload=1" +
		        	"&business=" + this.email + 
					"&currency_code=" + this.currency,
			counter = 1,
			itemsString = "";
			
		
		if( this.taxRate ){
			strn = strn + 
				"&tax_cart=" +  this.currencyStringForPaypalCheckout( this.taxCost );
		}
		
		for( var current in this.items ){
			var item = this.items[current];
			
			var optionsString = "";
			for( var field in item ){
				if( typeof(item[field]) != "function" && field != "id" && field != "price" && field != "quantity" && field != "name" /*&& field != "shipping"*/) {
					optionsString = optionsString + "&" + field + "=" + item[field] ; 
				}
			}
			optionsString = optionsString.substring(1);
			
			itemsString = itemsString 	+ "&item_name_" 	+ counter + "=" + item.name  +
									 	  "&item_number_" 	+ counter + "=" + counter +
										  "&quantity_"		+ counter + "=" + item.quantity +
										  "&amount_"		+ counter + "=" + this.currencyStringForPaypalCheckout( item.price ) + 
										  "&on0_" 			+ counter + "=" + "Options" + 
										  "&os0_"			+ counter + "=" + optionsString;
			counter++;
		}
		
		if( this.shipping() != 0){
			 itemsString = itemsString 	+ "&item_name_" 	+ counter + "=Shipping"  +
									 	  "&item_number_" 	+ counter + "=" + counter +
										  "&quantity_"		+ counter + "=1" + 
										  "&amount_"		+ counter + "=" + this.currencyStringForPaypalCheckout( this.shippingCost );
		}
		
		
		strn = strn + itemsString ;
		window.open (strn, "paypal", winpar);
	};

Please advise.

[skier]

Here's one example having multiple options and you can find a few tips and more examples here.   Note how the option variables are used.

Regards,

skier