<script type="text/javascript" src="popup.js"></script>

<a href="popup.html" class="popup">popup windowを開く</a>

.popup {
background: url(i_blank.gif) no-repeat 100% 2px;
padding-right:16px;
}

window.onload=autoPOP;

function autoPOP()
{
var x = document.getElementsByTagName('a');
for (var i=0;i<x.length;i++)
{
if (x[i].getAttribute('className') == 'popup' || x[i].getAttribute('class') == 'popup')
{
x[i].onclick = function () {
return winOpen(this.href)
}
x[i].title += '別窓で開きます';
}
}
};

function winOpen(url) {
window.open(
url,
'popup',
'width=500,height=350,scrollbars=0,resizable=1'
);

return false;
};