function calc(ppForm) {
	//Get the selected option
	var option_price = ppForm.os0.options[ppForm.os0.selectedIndex];
	//Get the <input name="amount"
	var amount = ppForm.amount;
	//Set amount value to the selected option value
	amount.value = option_price.value;
	//Get item_name
	var itemname = ppForm.item_name;
	//Get selected option innerHTML
	var selected_option = ppForm.os0.options[ppForm.os0.selectedIndex].innerHTML;
	//loop through options in select menu
	for (i=0; i <= ppForm.os0.options.length - 1; i++) {
		//Check if the function has been called already by checking if
		//the options innerHTML has been concatenated onto the itemname
		//value
		if (itemname.value.indexOf(ppForm.os0.options[i].innerHTML) > -1) {
			//We matched the innerHTML in the itemname value.
			//Get the length we need to chop off for the substr
			var chop = parseInt(itemname.value.length - ppForm.os0.options[i].innerHTML.length);
			//Remove the innerHTML form the previous function call
			//by substringing it
			itemname.value = itemname.value.substr(0, chop);
		}
	}
	//Concatenate the selected option innerHTML onto the itemname value
	itemname.value += ' ' + ppForm.os0.options[ppForm.os0.selectedIndex].innerHTML;
}