var InternetExplorer = navigator.appName.indexOf("Microsoft") != -1;

function overlayer_DoFSCommand(command, args) {
if (command=="fine")
{
	document.all.overlayer.style.height=0;
	document.all.overlayer.style.width=0;
} 
else
{
	var overlayerObj = InternetExplorer ? overlayer : document.overlayer;
	window.open(clickurl);
}
}
/*if (navigator.appName && navigator.appName.indexOf("Microsoft") !=-1 && navigator.userAgent.indexOf("Windows") != -1 && navigator.userAgent.indexOf("Windows 3.1") == -1) {
document.write('<SCRIPT LANGUAGE=VBScript\> \n');
document.write('on error resume next \n');
document.write('overlayer_FSCommand(ByVal command, ByVal args)\n');
document.write(' call overlayer_DoFSCommand(command, args)\n');
document.write('end sub\n');
document.write('</SCRIPT\> \n');
}*/