Please help explain the script below, what's the 'className';'unloadConfirmation','mask' stand for? Is there relative docs could be refered to?

[003210]

 
Hi,
Please help explain the script below, what's the 
'className';'unloadConfirmation','mask' stand for?
Is there relative docs could be refered to?

'var element=document.getElementById('container'); 
var settings = new Object();
settings.minWidth=200;
settings.minHeight=200;
settings.className='w_blue';
settings.width=700;
settings.height=500;
settings.resizable=true;
settings.element=element;
settings.title='网元2机箱1槽位5板卡1.1端口1';
settings.mask='semi-transparent';
settings.autoSize=false;
settings.unloadConfirmation=true;
Wicket.Window.create(settings).show();'









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