pop up window with netscape !??

[wxdqz]

I m trying to get all my websites compatible with all browsers :O)...now why netscape don t pop up the window with that ?
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function openpopup(){
var popurl="xxxxx.html"
winpops=window.open(popurl,"","width=220,height=220,top=178,left=110")
}
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hope you can help me thx


asch