getURL popup window size

[oxyde_mac_com]

hi,
i’m using a script to popup a window when the visitor click on a image.
i would like to know how to get the size property inclose in that script

imageframe_mc.onPress = function()
{getURL(“pics/”+images[index],"_blank");}

i’ve tryed
imageframe_mc.onPress = function()
{getURL(“pics/”+images[index],"_blank",“width=300”,“height=300”);}

but it doesn’t seems to work.