// set browser
var browser;
if ((navigator.userAgent.indexOf("MSIE") != -1) && (navigator.userAgent.indexOf("Mac") != -1)) {
	browser = "IE_MAC";
} else if ((navigator.userAgent.indexOf("Mozilla") != -1) && (navigator.userAgent.indexOf("Mac") != -1)) {
	browser = "MOZILLA_MAC";
} else if ((navigator.userAgent.indexOf("MSIE") != -1) && (navigator.userAgent.indexOf("Win") != -1)) {
	browser = "IE_PC";
} else {
	browser = "MOZILLA_PC";
}


var subwindow;
function popupwin(aDocument)
{
	if (!subwindow || subwindow.closed)
	{ 
		subwindow = window.open(aDocument,"subwindow","width=464, height=560,resizable,scrollbars");
	} else {
		subwindow.document.location.href = aDocument;
		subwindow.focus();
	}
}

var externalwindow;
function externalwin(aDocument)
{
	if (!externalwindow || externalwindow.closed)
	{ 
		externalwindow = window.open(aDocument,"externalwindow","resizable,location,toolbar,menubar,scrollbars");
	} else {
		if ((browser == "IE_MAC") || (browser == "MOZILLA_MAC")) {
			externalwindow.document.location.href = aDocument;
			externalwindow.focus();
		} else {
			externalwindow.close();
			var newwindow = window.open(aDocument,"externalwindow","resizable,location,toolbar,menubar,scrollbars");
			externalwindow = newwindow;
		}
	}
}