/** * Try this, see if it does what you're looking for... */function updateHeight () { var y, _y = 1000, d=document.getElementsByTagName("body")[0]; if (d.scrollHeight - d.scrollTop <= 1000) alert("not much more scroll to go!\n"+(d.scrollHeight - d.scrollTop)+"px left");}getPageHeight() appears to be working incorrectly. It is reporting a max of 686, while the getScrollHeight() is reporting in the thousands (appears correct). If getPageHeight() is just reporting the viewable area, how might i get it to report the *actual* page height.// These two functions are based on code from// http://www.quirksmode.org/viewport/compatibility.htmlfunction getPageHeight(){ var y; var test1 = document.body.scrollHeight; var test2 = document.body.offsetHeight; if (test1 > test2) { // all but Explorer Mac y = document.body.scrollHeight; } else { // Explorer Mac; would also work in Explorer 6 Strict, Mozilla and Safari y = document.body.offsetHeight; } return parseInt(y);}function _getWindowHeight(){ if(self.innerWidth) { frameWidth = self.innerWidth; frameHeight = self.innerHeight; } else if (document.documentElement && document.documentElement.clientWidth) { frameWidth = document.documentElement.clientWidth; frameHeight = document.documentElement.clientHeight; } else if (document.body) { frameWidth = document.body.clientWidth; frameHeight = document.body.clientHeight; }return parseInt(frameHeight);}function getScrollHeight(){ var y; // all except Explorer if(self.pageYOffset) { y = self.pageYOffset; } else if (document.documentElement && document.documentElement.scrollTop) { y = document.documentElement.scrollTop; } else if (document.body) { // all other Explorers y = document.body.scrollTop; } return parseInt(y)+_getWindowHeight();}