Sharepoint 2010 -> Javascript API window dialog

Wer in seiner Sharepointseite ein windows bzw. dialog selbst erstellen und öffnen will, der muss lediglich auf ein wenig Sharepoint API zurückgreifen:

If someone wants to use the window/dialog of Sharepoint in his Sharepoint instance, you can use the Sharepoint API like this:

<script type="text/javascript">
function MyDialog() {
var thisdialog = SP.UI.$create_DialogOptions();
thisdialog.url = "/_layouts/DialogDemo/MyDialog.htm";
thisdialog.width = 400;
thisdialog.height = 300;
SP.UI.ModalDialog.showModalDialog(thisdialog);
}
</script>

More information can be found here (thanks to the authors):
External blog
External blog