jquery integer post ajax php -> unrecognized expression 0 -

i have following,

var = 0; $('.more').click(function(){ $.ajax({     type:"post",     data{"num":i},     url:theurl,     success:function(html){         $container.append(html);         = i+18; 

etc. when post data , in php echo $_post['num']; getting error "syntax error, unrecognized expression: 0" , bunch of html following it. when don't include data number 0 works fine. going wrong here?

if argument append doesn't begin html tag, it's treated jquery selector. should either wrap in div:

$container.append("<div>" + html + "</div>"); 

or use .html() instead of .append()

$container.html(function(i, oldhtml) {     return oldhtml + html; });