Adding an onLoad trigger to an iFrame

I've got this:
var iframe = document.createElement("iframe");
I whant to add an onLoad event that trigger the function "qwerty()"
i tryed:
iframe.onLoad("qwerty();")
But...
ERROR! :mad:
any one can help me?

iframe.onload = qwerty;
Or if the onload handler has parameters:
iframe.onload = function(){qwerty(param1, param2)};
Watch the case of onload, it should not be onLoad.

Ah, thanks, You've got that award for something no? jaja