JS implementation Jump code: Multi-domain name point to the same space

JS <script>try {if (self.location = = "http://domain One/") {
Top.location.href = "http://domain name A/directory";
}
else if (self.location = = "http://domain name two/") {
Top.location.href = "http://domain name two/directory";
}
else if (self.location = = "http://domain name three/") {
Top.location.href = "http://domain name three/directory";
}
else if (self.location = = "http://domain name four/") {
Top.location.href = "http://domain name four/directory";
}
else {document.write ("Bad Access Address")} catch (e) {}</script>