function open_win (url, windowName, windowWidth, windowHeight, scrollbarFlag, menubarFlag, toolbarFlag) 
{
var scrollbarString = 'scrollbars=yes,';
if ((scrollbarFlag != null) && (scrollbarFlag == false)) {
	scrollbarString = '';
}

var menubarString = 'menubar=no,';
if ((menubarFlag != null) && (menubarFlag == true)) {
	menubarString = 'menubar=yes,';
}

var toolbarString = 'toolbar=no,';
if ((toolbarFlag != null) && (toolbarFlag == true)) {
	toolbarString = 'toolbar=yes,';
}

var parameterString = 'toolbar=no,location=no,status=no,' + menubarString + toolbarString + scrollbarString + 	'width=' + 900 + ',height=' + 550;
var newWindow = window.open(url, windowName, parameterString);
newWindow.focus();

return;
}