/*
version 1.0.5
Author     : pakag
Site    : http://posizioni-in-prima-pagina.blogspot.com 
*/
function AlertMessage(titolo,txt) {
        var is_chrome = navigator.userAgent.toLowerCase().indexOf('chrome') > -1;
        if (parseInt(navigator.appVersion)>3) {
            if (navigator.appName=="Netscape") {
                var windowHeight = window.innerHeight;
                var windowWidth =  window.innerWidth;
                var Yoffset = window.pageYOffset;
            }
            if (navigator.appName.indexOf("Microsoft")!=-1) {
                var windowWidth = document.documentElement.clientWidth;
                var windowHeight = document.documentElement.clientHeight;
                var Yoffset = document.documentElement.scrollTop;
            }
        }           
        
        document.getElementById("OverLayGrey").style.left=0+'px';
        document.getElementById("OverLayGrey").style.top=Yoffset-100+'px';
        document.getElementById("OverLayGrey").style.width=windowWidth+300+'px';
        document.getElementById("OverLayGrey").style.height=windowHeight+300+'px';
        document.getElementById("OverLayGrey").style.display='';
        leftAlert = (windowWidth/2) - 200;
        topAlert =  Yoffset+(windowHeight/2);
        
        document.getElementById("AlertMessageTitleTXT").innerHTML=titolo; 
        document.getElementById("AlertMessageBody").innerHTML=txt;
        
        document.getElementById("AlertMessage").style.left=leftAlert+'px';
        document.getElementById("AlertMessage").style.display='';
        var delta = document.getElementById("AlertMessage").offsetHeight ;  
        document.getElementById("AlertMessage").style.top=topAlert-(delta/2)+'px';
        document.getElementById("AlertMessage").style.width='560px';
        
        
        
        
        //window.pageYOffset = Yoffset+'px';
        
        document.documentElement.style.overflowX = 'hidden';     // horizontal scrollbar will be hidden
        document.documentElement.style.overflowY = 'hidden';     // vertical scrollbar will be hidden   
        
        
        if (navigator.appName=="Netscape" && is_chrome==false) {
                   window.scrollBy(0,Yoffset);
        } 
            
}

function CloseAlertMessage () {
    var is_chrome = navigator.userAgent.toLowerCase().indexOf('chrome') > -1;
    if (parseInt(navigator.appVersion)>3) {
            if (navigator.appName=="Netscape") {
                var windowHeight = window.innerHeight;
                var windowWidth =  window.innerWidth;
                var Yoffset = window.pageYOffset;
            }
            if (navigator.appName.indexOf("Microsoft")!=-1) {
                var windowWidth = document.documentElement.clientWidth;
                var windowHeight = document.documentElement.clientHeight;
                var Yoffset = document.documentElement.scrollTop;
            }
        }  
    document.getElementById("OverLayGrey").style.display='none';
    document.getElementById("AlertMessage").style.display='none'; 
    document.documentElement.style.overflowX = 'scroll';     // horizontal scrollbar will be hidden
    document.documentElement.style.overflowY = 'scroll';     // vertical scrollbar will be hidden
    if (navigator.appName=="Netscape" && is_chrome==false) {
                   window.scrollBy(0,Yoffset);
    }
}