var isMac = (navigator.appVersion.indexOf("Mac")!=-1) ? true : false;
var NS4 = (document.layers) ? true : false;
var IEmac = ((document.all)&&(isMac)) ? true : false;
var IE4plus = (document.all) ? true : false;
var IE4 = ((document.all)&&(navigator.appVersion.indexOf("MSIE 4.")!=-1)) ? true : false;
var IE5 = ((document.all)&&(navigator.appVersion.indexOf("MSIE 5.")!=-1)) ? true : false;
var IE6 = ((document.all)&&(navigator.appVersion.indexOf("MSIE 6.")!=-1)) ? true : false;
var ver4 = (NS4 || IE4plus) ? true : false;
var NS6 = (!document.layers) && (navigator.userAgent.indexOf('Netscape')!=-1)?true:false;

var IE5plus = IE5 || IE6;
var IEMajor = 0;

var excluded=['about ','or ',' about',' or',' about ',' or '];

function validateForm(f){
	var cleanQuery=f.query.value;
	for(var i=0;i<excluded.length;i++){
		cleanQuery=eval('cleanQuery.replace(/'+excluded[i]+'/gi,"")');
	}
	if(!cleanQuery.match(/\w/)){
		alert("Please enter search text.");
		return false;
	}
	f.query.value=cleanQuery;
	return true;
}