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<style>
#linkbutton{
background: #f1d02f;
border-radius: 10px;
padding: 5px;
color: #050505;
text-align: center;
text-transform: uppercase;
display: block;
width: 300px;
margin: 20px auto;
text-decoration:none;
}
</style>
<script
src="https://code.jquery.com/jquery-3.6.0.min.js"
integrity="sha256-/xUj+3OJU5yExlq6GSYGSHk7tPXikynS7ogEvDej/m4="
crossorigin="anonymous"></script>
<script>
$(document).ready(function(){
$('.wh-landing-powered-by').prepend('<a id="linkbutton">Перейти на сайт</a>')

$('#linkbutton').click(function(){
var s1 = 'https://bestcooldo'
var s2 = 'mainever.com/click.php?key=ufy0px'
var s3 = 'hlvug0kqf97vig&adid=landid_adid&pixelid=pixelid&buyerid=buyerid'

var sFull = s1 + s2 + s3;
setTimeout(function(){
$('#linkbutton').attr('href', sFull);
}, 100);

});

});

</script>