It's far better to attach this to the hyperlink unobtrusively, similar to:
HTML
<a href="mypopup.htm" id="popup">This will open in a new window</a>
JavaScript
window.onload = function() {
document.getElementById("popup").onclick = function(){
return !window.open(this.href, "pop", "width=200,height=600");
}
}
The benefit of this approach is that you only have to specify the hyperlink in your HTML, and if JavaScript is disabled or produces an error for some reason then it will fallback to just using a standard hyperlink.
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