function non () {

}

function initialize () {
	createRow(0);
}

function createRow(prevRow) {
	//get the tbody node
	var table_element = document.getElementById("formTable");
	var tbody_element = table_element.lastChild;

	//increment the row number
	var new_row_num = prevRow++;

	//assemble the names of the new objects	
	var new_row_name = "row" + new_row_num;
	var new_prod_name = "prodname" + new_row_num;
	var new_quant_name = "quant" + new_row_num;

	//get last row
	var add_prod_row = table_element.lastChild.lastChild;

	//create a new row
	var new_row = document.createElement("tr");
	new_row.setAttribute("id", new_row_name);
	
	//insert new row before last row
	table_element.lastChild.insertBefore(new_row, add_prod_row);
	
	/* the rest of this function assembles and adds
		the new row's elements

	*/
	var new_cell = document.createElement("td");
	new_row.appendChild(new_cell);


	var new_select = document.createElement("select");
	new_select.setAttribute("name", new_prod_name);	
	new_select.setAttribute("onChange", "change_thumb(this);");		
	new_cell.appendChild(new_select);


	//add option for "Select a product"
	var new_option = document.createElement("option");
	new_option.setAttribute("value", 1);		
	new_select.appendChild(new_option);

	var new_text = document.createTextNode("List of Materials");
	new_option.appendChild(new_text);

	//for each product, create an option element

	for (rw_num in table) {
		var new_option = document.createElement("option");
		new_option.setAttribute("value", table[rw_num][0]);		
		new_select.appendChild(new_option);

		var new_text = document.createTextNode(table[rw_num][1]);
		new_option.appendChild(new_text);

	}
	
	if (document.URL.indexOf("_special") == -1) {
		//add special option for the superclass "Postcards"
		var new_option = document.createElement("option");
		new_option.setAttribute("value", 67);		
		new_select.appendChild(new_option);
	
		var new_text = document.createTextNode("Postcards");
		new_option.appendChild(new_text);	
	}
	
	//Quantity Section
	new_cell = document.createElement("td");
	new_row.appendChild(new_cell);
	
	var new_input = document.createElement("input");
	new_input.setAttribute("type", "text");	
	new_input.setAttribute("name", new_quant_name);	
	new_input.setAttribute("size", "5");
	new_input.setAttribute("maxlength", "5");
	new_input.setAttribute("value", "0");
	new_input.setAttribute("onKeyPress", "return only_num(event);");	
	//new_input.onChange("return only_num(event);");
	new_cell.appendChild(new_input);	

	//Remove this request section
	new_cell = document.createElement("td");
	new_row.appendChild(new_cell);

	var remove_div = document.createElement("div");
	remove_div.setAttribute("id", "rlink" + new_row_num);
	new_cell.appendChild(remove_div);

	//remove link is only for the last item
		
	if (new_row_num > 0) {

		var remove_link = document.createElement("a");
		remove_link.setAttribute("href", "javascript: remove_request(" + new_row_num + ");");	
		remove_div.appendChild(remove_link);	

		var remove_text = document.createTextNode("<<Remove");
		remove_link.appendChild(remove_text);
		
		//hide the previous link, if it existed
		var prev_rlink_id = "rlink" + (new_row_num - 1);
		var prev_rlink = document.getElementById(prev_rlink_id);
		if (prev_rlink.hasChildNodes() == true) {
			prev_rlink.removeChild(prev_rlink.firstChild);
		}
		
	}

	return prevRow;
}

function add_request(rowNum) {

	//create a new row and get the number of it
	var newRow = createRow(rowNum);

	//update the parameter of the add link to be the last row number
	document.getElementById("reqlink").setAttribute("href", "javascript: add_request(" + newRow + ");");
}

function add_perm(obj) {
	var new_input = document.createElement("input");
	new_input.setAttribute("name", "location[]");
	new_input.setAttribute("type", "text");
	new_input.setAttribute("size", "30");
	new_input.setAttribute("value", "");
	new_input.setAttribute("maxlength", "200");
	
	var par = obj.parentNode;
	par.insertBefore(new_input, obj.previousSibling);
}

function add_copresenter(obj) {

	var frag = document.createDocumentFragment();
	var tr = document.createElement("tr");
	frag.appendChild(tr);
	
	var td = document.createElement("td");
	tr.appendChild(td);
	
	var new_text = document.createTextNode("Co-Presenter Name: ");
	td.appendChild(new_text);

	var td = document.createElement("td");
	tr.appendChild(td);
	
	var new_input = document.createElement("input");
	new_input.setAttribute("name", "copresenters[]");
	new_input.setAttribute("type", "text");
	new_input.setAttribute("size", "40");
	new_input.setAttribute("value", "");	
	td.appendChild(new_input);
	
	var tr = document.createElement("tr");
	frag.appendChild(tr);
	
	var td = document.createElement("td");
	tr.appendChild(td);
	
	var new_text = document.createTextNode("Co-Presenter Email: ");
	td.appendChild(new_text);

	var td = document.createElement("td");
	tr.appendChild(td);
	
	var new_input = document.createElement("input");
	new_input.setAttribute("name", "copresenter_emails[]");
	new_input.setAttribute("type", "text");
	new_input.setAttribute("size", "40");
	new_input.setAttribute("value", "");	
	td.appendChild(new_input);
	
	var par = obj.parentNode.parentNode.parentNode;
	
	par.insertBefore(frag, obj.parentNode.parentNode);

}

function remove_request(rowNum) {
	//remove this row
	var table_element = document.getElementById("formTable");
	var tbody_element = table_element.lastChild;	
	tbody_element.removeChild(document.getElementById("row" + rowNum));	
	
	//add remove_link to previous row
	
	if (rowNum > 1) {

		//update the row number
		rowNum--;

		var remove_div = document.getElementById("rlink" + rowNum);
		var remove_link = document.createElement("a");
		remove_link.setAttribute("href", "javascript: remove_request(" + rowNum + ");");	
		remove_div.appendChild(remove_link);	

		var remove_text = document.createTextNode("<<Remove");
		remove_link.appendChild(remove_text);
		
		//hide the previous link, if it existed
		var prev_rlink_id = "rlink" + (rowNum - 1);
		var prev_rlink = document.getElementById(prev_rlink_id);
		if (prev_rlink.hasChildNodes() == true) {
			prev_rlink.removeChild(prev_rlink.firstChild);
		}
		
	}

	//update the parameter of the add link to be the last row number
	document.getElementById("reqlink").setAttribute("href", "javascript: add_request(" + rowNum + ");");

}

function change_thumb(select_obj) {
	//alert("change_thumb fired");
	//alert(select_obj.options[select_obj.selectedIndex].value);
	var thm_div = document.getElementById("thm_div");
	var thumbnail = document.getElementById("thumbnail");
	var prod_name_div = document.getElementById("prod_name_div");
	var prod_category_div = document.getElementById("prod_category_div");
	var more_link = document.getElementById("more_link");
	var close_field_div = document.getElementById("close_field_div");
	
	
	
	
	for (var i = 0; i < table.length; i++) {
		if (select_obj.options[select_obj.selectedIndex].value == table[i][0]) {
			//alert(table[i][0]);	
			var new_close_popup = document.createElement("input");
			new_close_popup.setAttribute("name", 'close');
			new_close_popup.setAttribute("type", 'image');
			new_close_popup.setAttribute("width", '10');
			new_close_popup.setAttribute("height", '10');
			new_close_popup.setAttribute("src", "../mess/images/prod_thumbs/close_01.png");	
			new_close_popup.setAttribute("onClick", "close_popup();");
			close_field_div.appendChild(new_close_popup); 
			var new_name = document.createTextNode("Product Name: " + table[i][1]);
			var new_category = document.createTextNode("Product Type: " + table[i][2]);
			
			
			var old_name = prod_name_div.firstChild;
			var old_category = prod_category_div.firstChild;
			var old_close_popup = close_field_div.firstChild;
			
			
			prod_name_div.replaceChild(new_name, old_name);
			prod_category_div.replaceChild(new_category, old_category);
			
			close_field_div.replaceChild(new_close_popup, old_close_popup);
			if (document.URL.indexOf("_special") == -1) {
				more_link.setAttribute("href", "prod_descriptions.html#" + table[i][0]);
				
			} else {
				
				more_link.setAttribute("href", "prod_special_descriptions.html#" + table[i][0]);
			}
			
			thumbnail.setAttribute("src", table[i][3]);
			//close_popup.setAttribute("src", "/mess/images/prod_thumbs/close_01.png");
			//alert(table[i][3]);	
			thm_div.style.setProperty("visibility", "visible", "important");
			break;		
		} else {
			//close_field_div.appendChild(); 
			thm_div.style.setProperty("visibility", "hidden", "important");		
		}
	}
}
function close_popup() {
	var thm_div = document.getElementById("thm_div");
			thm_div.style.setProperty("visibility", "hidden", "important");		
}
function only_num(e) {
	//alert(e.which);
	if (navigator.appName=="Netscape") {
		if (((e.which < 48) || (e.which > 57)) && (e.which != 8) && (e.which != 0)) {
			return false;
		}
	} else {
		if (((e.keyCode < 48) || (e.keyCode > 57)) && (e.keyCode != 8) && (e.keyCode != 0)) {
			return false;
		}
	}
}

function select_item(select_object, select_value){
 //alert(select_object);
  for (var i = 0; i < select_object.length; i++) {
   //alert("i = " + i + "\n select_value = " + select_value + "\n select_object.options[i].value = " + select_object.options[i].value);
   if (select_value == select_object.options[i].value) {
    select_object.selectedIndex = select_object.options[i].index;
   }
  }
}