Accessing Current URL using Prototype
- by Jason Nerer
Hi folks,
following Ryan Bates Screencast #114 I'm trying to generate endless pages using prototype. In difference to Ryan's showcase my URL called via the AJAX request shall be handled dynamically, cause I do not always call the same URL when the user reaches the end of my page.
So my JS running in backround looks like that and uses document.location.href instead a fixed URL:
var currentPage = 1;
function checkScroll() {
if (nearBottomOfPage()) {
currentPage++;
new Ajax.Request(document.location.href + '?page=' + currentPage, {asynchronous:true, evalScripts:true, method:'get'});
}
else {
setTimeout("checkScroll()", 250);
}
}
function nearBottomOfPage() {
return scrollDistanceFromBottom() < 10;
}
function scrollDistanceFromBottom(argument) {
return pageHeight() - (window.pageYOffset + self.innerHeight);
}
function pageHeight() {
return Math.max(document.body.scrollHeight, document.body.offsetHeight);
}
document.observe('dom:loaded', checkScroll);
The question is: The code seems to work in Safari but fails in FF 3.6. It seems that FF calculates scrollHeight or offsetHeight differently. How can I prevent that?
Thx in advance.
Jason
