var scrollMaxSpeed = 30;
var scrollWheelStep = 20;
var scrollStep = 1;
var scrollAccel = 1;
var scrollFrame;
var frameDoc = false;
function showFrame(id,stylesheet,script) {
handleResize();
scrollFrame = document.getElementById("scrollframe");
frames["scrollframe"].scrollTo(0,0);
frameDoc = scrollFrame.contentDocument ? scrollFrame.contentDocument : scrollFrame.contentWindow.document;
frameDoc.open();
frameDoc.writeln('');
frameDoc.writeln('');
if(stylesheet) {
frameDoc.writeln('');
}
if(!script) {
script = "";
}
frameDoc.writeln('');
frameDoc.write(document.getElementById(id).innerHTML);
frameDoc.writeln('');
frameDoc.close();
}
function handleResize() {
theHeight = self.innerHeight ? self.innerHeight : document.body.clientHeight;
headerHeight = document.getElementById("header").offsetHeight;
footerHeight = document.getElementById("footer").offsetHeight;
frameHeight = theHeight - headerHeight - footerHeight;
document.getElementById("main").style.height = (frameHeight) + "px";
document.getElementById("scrollDown").style.top = (theHeight - headerHeight - footerHeight - 23) + "px";
handleScroll();
}
function handleScroll() {
if (frameDoc) {
contentHeight = frameDoc.body.scrollHeight;
if (contentHeight > frameHeight) {
document.getElementById("scrollUp").style.display = "block";
document.getElementById("scrollDown").style.display = "block";
} else {
document.getElementById("scrollUp").style.display = "none";
document.getElementById("scrollDown").style.display = "none";
}
}
}
function handleWheel(e) {
direction = (e.wheelDelta > 0 ? -1 : 1);
scrollFrame = frames["scrollframe"];
scrollFrame.scrollBy(0,direction*scrollWheelStep);
}
function scrollDown() {
scrollStart(1);
}
function scrollUp() {
scrollStart(-1);
}
function scrollStart(direction) {
scrollFrame = frames["scrollframe"];
scrollFrame.scrollBy(0,direction*scrollStep);
if (scrollStep < scrollMaxSpeed || scrollAccel < 0) {
scrollStep += 2*scrollAccel;
}
if (scrollStep > 0) {
scrollTimer = setTimeout("scrollStart(" + direction + ")",100);
} else {
scrollAccel = 1;
scrollStep = 1;
};
}
function scrollStop() {
if (scrollAccel == 1 && scrollStep != 1) {
scrollAccel = -2;
}
}