var popupHandle;

function popup(picUrlString, windowWidth, windowHeight){
	if(popupHandle || popupHandle!=null){
		if (!popupHandle.closed)
			popupHandle.close();
	}
	popupHandle=null;
	var x=(screen.width-windowWidth)/2
	var y=(screen.height-windowHeight)/2
	var featureString = "toolbar=no,scrollbars=no,resizable=no"
	featureString = ',left='+x + ',top='+y
	featureString += ',width='+windowWidth+',height='+windowHeight
	popupHandle = window.open( "pages/php/popup.php?windowWidth="+windowWidth+"&windowHeight="+windowHeight+"&picUrlString="+picUrlString ,"popup",featureString)
	return popupHandle;
}

function winclose(){
	if (window.popupHandle!=null && !window.popupHandle.closed){
		window.popupHandle.close();
	}
}

function doNothing(){}