Sharepoint 2010: Open New Dialog

function ShowDialog_Click() {
   var options = {url: "http://somecodesnippets.blogspot.com/",title: "Some Code Snippets",
   allowMaximize: true, showClose: true,
   width: 550,height: 550,
   dialogReturnValueCallback: callBackFunction};
   SP.UI.ModalDialog.showModalDialog(options);
}