function a_target_popup() {
	var a_class="popup";
	var str="width=550,height=500,left=30,top=50,menubar=no,toolbar=no,location=no,status=no,resizable=no,scrollbars=yes";
	var windowname="example";
	var dc_a=document.getElementsByTagName("a");
	for (var i=0; i<dc_a.length; i++) {
		if (dc_a[i].className == a_class) {
			dc_a[i].onclick = function() {
				window.open(this.href,windowname,str);
				return false;
			}
		}
	}
}
if (window.addEventListener) {
	window.addEventListener("load",a_target_popup, false);
}
else if (window.attachEvent) {
	window.attachEvent("onload",a_target_popup);
}