// http://www.alistapart.com/articles/printtopreview




addLoadEvent (function() {
	/* more code to run on page load */
	if (document.getElementById){
        //add extra functions to page tools list
        var print_page = document.getElementById('printBox');                                                        

        //create print link
        // var print_function = document.createElement('p');
			
        // print_function.setAttribute('class', 'print');
        //IE doesn't like this
        var print_function_link = document.createElement('a');
		print_function_link.setAttribute ("class","rolloverPrint");
		print_function_link.setAttribute ("title","mostly text only printer friendly page");	
		print_function_link.onclick = function() { 
			print_preview(); 
			return false;
			}
		print_function_link.setAttribute('href', '#');
		var print_function_link_text = document.createTextNode('print');
		print_function_link.appendChild (print_function_link_text);
            print_page.appendChild (print_function_link);            
			// use if calling 'var print_function = document.createElement('p');'
			// print_function.appendChild (print_function_link);            
            // print_page.appendChild(print_function);            
    }
});



function print_preview() {

	// Switch the stylesheet
	setActiveStyleSheet('print preview');


	// Create preview message
	add_preview_message();


	// Print the page
	window.print();

}



function add_preview_message() {
	var main_content = document.getElementById('mainContainer');
	var main_body = main_content.parentNode;

	if (document.getElementById) {
		var preview_message = document.createElement('div');
		preview_message.id = 'preview-message';


		// Create Heading
		var preview_header = document.createElement('h3');
		var preview_header_text = document.createTextNode('print preview');
		preview_header.appendChild (preview_header_text);

		
		// Create paragraph
		var preview_para = document.createElement('p');
		var preview_para_text = document.createTextNode('');

		
		var cancel_function_link = document.createElement('a');
			cancel_function_link.onclick = function() {
				cancel_print_preview();
				return false; 
				};

			cancel_function_link.setAttribute('href', '#');	

		var cancel_function_link_text = document.createTextNode('return to screen view');
		cancel_function_link.appendChild (cancel_function_link_text);
		preview_para.appendChild (preview_para_text); //
		preview_para.appendChild (cancel_function_link);

		

		// Put it all toegether
		preview_message.appendChild (preview_header); 
		preview_message.appendChild (preview_para);
		main_body.insertBefore (preview_message, main_content);

	}
}



function cancel_print_preview() {

	// Destroy the preview message
	var print_preview = document.getElementById('preview-message');
	var main_body = print_preview.parentNode;
	main_body.removeChild(print_preview);

	// Switch back stylesheet
	setActiveStyleSheet('default');

}



function setActiveStyleSheet(title) {

   var i, a, main;
   for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {

     if(a.getAttribute("rel").indexOf("style") != -1
        && a.getAttribute("title")) {
       a.disabled = true;
       if(a.getAttribute("title") == title) a.disabled = false;

     }

   }

}