problem with : document.createElement("iframe") and onload

[Andy Gritsan]

1.

newFrame = document.createElement("iframe");       
newFrame.id='aa1';
newFrame.onload = aa(this.id);
document.getElementsByTagName('body')[0].appendChild(newFrame);
function aa(id){alert(id);}
 

output: undefined
2.

document.write("<br><iframe id = 'aa1' onload = 'aa(this.id)'></iframe>");
function aa(id){alert(id);}
output: aa1
 

Why in 1 output undefined?

[johny10151981]

What is this object? where does it come from? this object is invalid here. resolve it first

[ivansyah]

onload is Body ELement function....
I think what u need is

newFrame = document.createElement("iframe");       
newFrame.id = 'aa1';
document.body.appendChild(newFrame) ;
document.body.onload = aa(newFrame.id) ;
function aa(id){alert(id);}
 

[Andy Gritsan]

resolved, thank you!