var popupWin = null
    function openWin(iURL, iW, iH){
    	if (popupWin && !popupWin.closed) {
    		popupWin.close();
    	}
		
		mW = iW + 20;
		mH = iH + 20;
		
    	popupWin = open(iURL, "PopupWin", "width=" + mW + ",height=" + mH+", scrollbars=yes");
     	popupWin.document.close();
	}