function CustomAlert(){
this.alert = function(message,title){
document.body.innerHTML = document.body.innerHTML + '
';
let dialogoverlay = document.getElementById('dialogoverlay');
let dialogbox = document.getElementById('dialogbox');
let winH = window.innerHeight;
dialogoverlay.style.height = winH+"px";
dialogbox.style.top = "100px";
dialogoverlay.style.display = "block";
dialogbox.style.display = "block";
document.getElementById('dialogboxhead').style.display = 'block';
if(typeof title === 'undefined') {
document.getElementById('dialogboxhead').style.display = 'none';
} else {
document.getElementById('dialogboxhead').innerHTML = ' '+ title;
}
document.getElementById('dialogboxbody').innerHTML = message;
document.getElementById('dialogboxfoot').innerHTML = '';
}
this.ok = function(){
document.getElementById('dialogbox').style.display = "none";
document.getElementById('dialogoverlay').style.display = "none";
}
}
let customAlert = new CustomAlert();