JSFiddle - React, Tailwind, and code Playground

HTML

<input type="checkbox" id="site1" name="site1" value="site1" onclick="changeSite(this);">Site1<br>
<input type="checkbox" id="site2" name="site2" value="site2" onclick="changeSite(this);">Site2<br>
<input name="submit" value="open it up!" type="button" onclick="validate()" id="openAll">
<div id="newLink"></div>

CSS

.hrefBtn{
    -moz-box-shadow:inset 0px 1px 0px 0px #ffffff;
	-webkit-box-shadow:inset 0px 1px 0px 0px #ffffff;
	box-shadow:inset 0px 1px 0px 0px #ffffff;
	background:-webkit-gradient( linear, left top, left bottom, color-stop(0.05, #ededed), color-stop(1, #dfdfdf) );
	background:-moz-linear-gradient( center top, #ededed 5%, #dfdfdf 100% );
	filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#ededed', endColorstr='#dfdfdf');
	background-color:#ededed;
	-webkit-border-top-left-radius:6px;
	-moz-border-radius-topleft:6px;
	border-top-left-radius:6px;
	-webkit-border-top-right-radius:6px;
	-moz-border-radius-topright:6px;
	border-top-right-radius:6px;
	-webkit-border-bottom-right-radius:6px;
	-moz-border-radius-bottomright:6px;
	border-bottom-right-radius:6px;
	-webkit-border-bottom-left-radius:6px;
	-moz-border-radius-bottomleft:6px;
	border-bottom-left-radius:6px;
	text-indent:0;
	border:1px solid #dcdcdc;
	display:inline-block;
	color:#777777;
	font-family:arial;
	font-size:15px;
	font-weight:bold;
	font-style:normal;
	height:50px;
	line-height:50px;
	width:100px;
	text-decoration:none;
	text-align:center;
	text-shadow:1px 1px 0px #ffffff;
}

JavaScript

window.validate= function() {
    $(":checkbox:checked").each(function() {
        var sitename = $(this).val();
        window.open('http://www.' + sitename + '.com');
    });
    return false;
}

window.changeSite= function(obj){
   var site = $(obj).val();
    $("#selectedSite").attr("href",site);
    $("#selectedSite").html(site);
    if($(obj).prop("checked")){
        $("<a/>",{
            id: site+"Test",
            href:site,
            html: site,
            class: "hrefBtn"
        }).appendTo("#newLink");
    }
    else{
        $("#"+site + "Test").remove();
    }

    if($("#site1").prop("checked") && $("#site2").prop("checked")){
           $("#site1Test").hide();
           $("#site2Test").hide();
           $("#openAll").show();
       }
    else{
           $("#site1Test").show();
           $("#site2Test").show();
           $("#openAll").hide();
    }
    
}

$(function(){
    $("#openAll").hide();
});