I have the below js. popUpWindow function is called from a command button click event. Not sure, why child window is not closing.

var loadedWindows = new Array();


//Define window width and height
var screenWidth;
var screenHeight;
var x = screen.width;
var y = screen.height;
var num1 = new Number(x);
var w = num1 - 125;
var num2 = new Number(y);
var h= num2 - 75;
var left = num1;


/**
* Define method to open window keep track of opened child windows.
*/
popUpWindow = function(wndUrl, wndName, wndWidth, wndHeight, sourceID){

var windObj = null;
try
{	
//set default width 
if(typeof wndWidth == 'undefined') wndWidth=screenWidth;
//set default height
if(typeof wndHeight == 'undefined') wndHeight=screenHeight;


if(document.documentElement.clientWidth < 1090){
windObj = window.open(wndUrl, 
//misc options to open a window, again mostly optional 
wndName, "left="+left+",top=0,location=0,status=1,scrollbars=yes, resizable=yes,width="+(h-110)+",height="+(h+65));


} else {
windObj = window.open(wndUrl, 
//misc options to open a window, again mostly optional 
wndName, "left="+left+",top=0,location=0,status=1,scrollbars=yes, resizable=yes,width="+y+",height="+x);
}



loadedWindows[loadedWindows.length] = windObj;



return windObj;
}
catch(ex){
alert('WindowController.popUpWindow: ' + 'Exception occured, message: ' + ex.message);
}
return windObj;
};


/**
* Method to register close event - to close window on close of parent window 
*/
function WireEvent(elem,target,func){
if (elem.addEventListener)
elem.addEventListener(target, func, false); //FF
else if (elem.attachEvent){

elem.attachEvent(target, func); //IE
}
}

/**
* method to close all windows 
*/
closeAllWindows = function(){

for(var x = 0; x < loadedWindows.length; x++){

try{

loadedWindows[x].close();


}
catch(err) {
alert('WindowController.closeAllWindows: ' +'Exception occured, message: ' + err.message);
}
}
};

WireEvent(window,'onunload',this.closeAllWindows);