var content_shield = null;
var modal_dialog = null;
var modal_iframe;

function getPageSize(){
var xScroll, yScroll;
if (window.innerHeight && window.scrollMaxY) {
xScroll = document.body.scrollWidth;
yScroll = window.innerHeight + window.scrollMaxY;
} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
xScroll = document.body.scrollWidth;
yScroll = document.body.scrollHeight;
} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
xScroll = document.body.offsetWidth;
yScroll = document.body.offsetHeight;
}
var windowWidth, windowHeight;
var pageHeight, pageWidth;
var arrayPageSize;
if (self.innerHeight) { // all except Explorer
windowWidth = self.innerWidth;
windowHeight = self.innerHeight;
} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
windowWidth = document.documentElement.clientWidth;
windowHeight = document.documentElement.clientHeight;
} else if (document.body) { // other Explorers
windowWidth = document.body.clientWidth;
windowHeight = document.body.clientHeight;
}
// for small pages with total height less then height of the viewport
if(yScroll < windowHeight){
pageHeight = windowHeight;
} else {
pageHeight = yScroll;
}
// for small pages with total width less then width of the viewport
if(xScroll < windowWidth){
pageWidth = windowWidth;
} else {
pageWidth = xScroll;
}
arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight)
return arrayPageSize;
}

function launch_splash() {
var dialog_html = "SPLASH CONTENT";
show_modal_dialog(dialog_html);
}

function body_onscroll() {
window.status = getScrollXY();
}

function show_modal_dialog(dialog_html) {
if (content_shield == null) {
content_shield = document.createElement("div");
content_shield.style.height = getPageSize()[1];
document.body.appendChild(content_shield);
content_shield.className = "content_faded";
window.status="disabled";
//Because the div is only ever going to be the height of the displayable area of the browser (100%),
//it needs to move with the scrollbars (width will always be 100%). We could instead explicitly set
//div height to the complete height of the page including non-visible scrollable areas, but then
//we would need to handle window resize events as well.
//eg. addEvent(document.body, "onscroll", body_onscroll);
}
modal_dialog = document.getElementById("splash");
// modal_dialog.innerHTML = dialog_html;
modal_dialog.style.display = "block";
modal_iframe = document.getElementById("splashiframe");

}
function hide_modal_dialog() {
modal_dialog.style.display = "none";
if (content_shield != null) {
document.body.removeChild(content_shield);
content_shield = null;
}
}

function addEvent(obj, evType, fn, useCapture){
//From http://www.scottandrew.com/weblog/articles/cbs-events
if (obj.addEventListener){
 obj.addEventListener(evType, fn, useCapture);
 return true;
} else if (obj.attachEvent){
 var r = obj.attachEvent("on"+evType, fn);
 return r;
} else {
 alert("Handler could not be attached");
}
}

function getScrollXY() {
var scrOfX = 0, scrOfY = 0;
if( typeof( window.pageYOffset ) == 'number' ) {
 //Netscape compliant
 scrOfY = window.pageYOffset;
 scrOfX = window.pageXOffset;
} else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
 //DOM compliant
 scrOfY = document.body.scrollTop;
 scrOfX = document.body.scrollLeft;
} else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
 //IE6 standards compliant mode
 scrOfY = document.documentElement.scrollTop;
 scrOfX = document.documentElement.scrollLeft;
}
return [ scrOfX, scrOfY ];
}