OpenMultiple.html

<!doctype html>
<html>
<head>
<title>Open Multiple Windows</title>
<script>
function openWindow(){
    var x = document.getElementById('a').value.split('\n');
    for (var i = 0; i < x.length; i++)
        if (x[i].indexOf('.') > 0)
            if (x[i].indexOf('://') < 0)
                window.open('http://'+x[i]);
            else
                window.open(x[i]);
}
</script>
<style>
html, body
{
    height : 99%;
    width  : 99%;
}

textarea
{
    height : 80%;
    width  : 90%;
}
</style>
</head>
<body>
<textarea id="a"></textarea>
<br>
<input type="button" value="Open Windows" onClick="openWindow()">
<input type="button" value="Clear" onClick="document.getElementById('a').value=''">
</body>
</html>