Can someone canonically differentiate between scrollTop and scrollHeight?

Question

For example,

function fnCheckScroll(){   
    var iNewHeight = oDiv.scrollHeight;
    var iscrolTop = oDiv.scrollTop; 
    alert(\"The value of the scrollHei         


        

Answer 1

See the MDC articles, scrollTop and scrollHeight. In summary, scrollTop is how much it's currently scrolled, and scrollHeight is the total height, including content scrolled out of view.