function toogle(total, mudanca){
	if(mudanca==5){
		books.getbooks();
	}
	for(i=1; i<=total; i++){
		executa = "parte" + i + " = document.getElementById(\"pagina" + i + "\")";
		eval (executa);
		executa = "parte" + i + ".style.display = \"none\"";		
		eval (executa);		
	}
	executa = "parte" + mudanca + ".style.display = \"\"";
	eval (executa);
}



function windowOpener(windowHeight, windowWidth, windowName, windowUri){
    var centerWidth = (window.screen.width - windowWidth) / 2;
    var centerHeight = (window.screen.height - windowHeight) / 2;

    newWindow = window.open(windowUri, windowName, 'resizable=no,menubar=no,toolbar=no,scrollbars=no,status=no,location=no,width=' + windowWidth + 
        ',height=' + windowHeight + 
        ',left=' + centerWidth + 
        ',top=' + centerHeight);

    newWindow.focus();
    return newWindow.name;
}