Question

I know I might be doing something wrong. Can anyone please point out why I’m getting top as object??

$(document).ready(function(){
    topwithpx='0px';
    alert(topwithpx);
    topstr=topwithpx.substr(0,topwithpx.length-2);
    alert(topstr);
    top=parseInt(topstr);
    alert(top);
});​

http://jsfiddle.net/kjMs9/

Thanks all: ‘top’ is reserved keyword (Window.top). My bad. Accepting first ans. +1 to all for quick ans.

Answer 1

Because it’s essentially window.top, which is Window object. Use var top instead to prevent mixing local variable with global (= properties of window object) ones.

In fact, make var-ing your function variables something of a common routine – to prevent getting similar gotchas in the future. )