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;
    
    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;
    }
    if (xScroll < windowWidth) {
        pageWidth = windowWidth;
    } else {
        pageWidth = xScroll;
    }

    arrayPageSize = new Array(pageWidth, pageHeight, windowWidth, windowHeight)

    return arrayPageSize;
    //return pageHeight;
}



function openMask() {


    var divObject = document.getElementById("MaskDiv");
    document.getElementById("MaskDiv").style.width = getPageSize()[0].toString();
    document.getElementById("MaskDiv").style.height = getPageSize()[1].toString();
    document.getElementById("MaskDiv").style.display = "block";
    if (Browsers() == "IE") {
        document.getElementById("MaskDiv").style.filter = "alpha(opacity=10);";
    } else if (Browsers() == "FF") {
        document.getElementById("MaskDiv").style.opacity = "0.1;";
    }
    else {
        divObject.setAttribute("style","-khtml-opacity:0.1;");
        //document.getElementById("MaskDiv").style.-khtml-opacity = "0.1;";
    }
    var sel = document.getElementsByTagName("SELECT")
    for (i = 0; i < sel.length; i++) {
        sel[i].disabled = "true";
    }
}

function closeMask() {
    document.getElementById("MaskDiv").style.display = "none";
    var sel = document.getElementsByTagName("SELECT")
    for (i = 0; i < sel.length; i++) {
        sel[i].disabled = "";
    }
}

function Browsers() {
    if (window.navigator.userAgent.indexOf("MSIE") >= 1) {
        return "IE";
    }
    else {
        if (window.navigator.userAgent.indexOf("Firefox") >= 1) {
            return "FF";
        }
        else {
            return "";
        }
    }
}