function openWindow(strURL,winName,winWidth,winHeight){

	var objWindow,blnlongcall=false;
	var winHeightBrowserShell=0;

	//center window
	var screenMarginL=0;
	var screenMarginTop=0;
	if(winWidth>0 && winHeight>0){
		screenMarginL=(screen.width - winWidth)/2;
		screenMarginTop=(screen.height - winHeight - winHeightBrowserShell)/2;
	}

	if(blnlongcall==true){
		window.open(strURL,winName,'width='+winWidth+',height='+winHeight+',left=' + screenMarginL + ',top=' + screenMarginTop + ',toolbar=no,location=no,directories=no,status=no,menubar=no,titlebar=no,scrollbars=no,resizable=yes,copyhistory=no');
	}else{
		objWindow=window.open(strURL,winName,'scrollbars,resizable,width='+winWidth+',height='+winHeight+',left=' + screenMarginL + ',top=' + screenMarginTop);
	}
}