If you are looking for pop up text with the close button , maybe you can try this script . example https://begjajaya.com/

gistfile1.txt

<div class="floating_top">	
<style type="text/css">
#topbar{
position: fixed;
top: 0px;
left: 0px;
right: 0px;
bottom: 0px;
margin: 0px;
background-color: rgba(0, 0, 0, 0.65);
z-index: 9998;
}
</style> <script type="text/javascript">
var persistclose=0 //set to 0 or 1. 1 means once the bar is manually closed, it will remain closed for browser session
var startX = 0 //set x offset of bar in pixels
var startY = 0 //set y offset of bar in pixels
var verticalpos="fromtop" //enter "fromtop" or "frombottom"

function iecompattest(){
return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
}

function get_cookie(Name) {
var search = Name + "="
var returnvalue = "";
if (document.cookie.length > 0) {
offset = document.cookie.indexOf(search)
if (offset != -1) {
offset += search.length
end = document.cookie.indexOf(";", offset);
if (end == -1) end = document.cookie.length;
returnvalue=unescape(document.cookie.substring(offset, end))
}
}
return returnvalue;
}

function closebar(){
if (persistclose)
document.cookie="remainclosed=0"
document.getElementById("topbar").style.visibility="hidden"
}

function staticbar(){
barheight=document.getElementById("topbar").offsetHeight
var ns = (navigator.appName.indexOf("Netscape") != -1) || window.opera;
var d = document;
function ml(id){
var el=d.getElementById(id);
if (!persistclose || persistclose && get_cookie("remainclosed")=="")
el.style.visibility="none"
if(d.layers)el.style=el;
el.sP=function(x,y){this.style.left=x+"px";this.style.top=y+"px";};
el.x = startX;
if (verticalpos=="fromtop")
el.y = startY;
else{
el.y = ns ? pageYOffset + innerHeight : iecompattest().scrollTop + iecompattest().clientHeight;
el.y -= startY;
}
return el;
}
window.stayTopLeft=function(){
if (verticalpos=="fromtop"){
var pY = ns ? pageYOffset : iecompattest().scrollTop;
ftlObj.y += (pY + startY - ftlObj.y)/0;
}
else{
var pY = ns ? pageYOffset + innerHeight - barheight: iecompattest().scrollTop + iecompattest().clientHeight - barheight;
ftlObj.y += (pY - startY - ftlObj.y)/0;
}
ftlObj.sP(ftlObj.x, ftlObj.y);
setTimeout("stayTopLeft()", 0);
}
ftlObj = ml("topbar");
stayTopLeft();
}

if (window.addEventListener)
window.addEventListener("load", staticbar, false)
else if (window.attachEvent)
window.attachEvent("onload", staticbar)
else if (document.getElementById)
window.onload=staticbar

</script>
<div class="clear">
</div>
<div id="topbar">
<div style="padding-top: 140px;text-align: center;z-index: 9998;">
<a href="#" onclick="closebar(); return false"><img alt="close" style="z-index: 9999;" src="YOUR IMAGE CLOSE URL"/></a></div>
<center><div style="width:260px;height: 260px;padding-top: 5px;background: transparent;">

<div style="width:260px;">
<a href="YOU URL" rel="nofollow" target="_blank" title="YOU URL TITLE"><img alt="YOUR IMAGE ALT" border="0" src="YOUR IMAGE URL" /></a>

</div>

</div></center></div>
</div>