if ((navigator.appName != "Microsoft Internet Explorer") || (navigator.userAgent.indexOf("MSIE") <= 0) || (typeof( navigator.appMinorVersion ) == "undefined")){ 
location.href = "error.html";
}else{


	if(navigator.appVersion.charAt(0) < "4"){
	location.href = "error.html";
	}
	
	if(navigator.userAgent.indexOf("OPERA") >= 0){
	location.href = "error.html";
	}
	
	for(var i=0; i<navigator.plugins.length; i++){
	if( (navigator.plugins[i].name.toLowerCase()).indexOf("opera")>-1 )
	location.href = "error.html";
	} 

	
}