String.prototype.equalsIgnoreCase = function(str){               
        return (new String(this.toLowerCase())==(new
String(str)).toLowerCase());
}

String.prototype.trim = function() {
	return this.replace(/^\s+|\s+$/g,"");
}
String.prototype.ltrim = function() {
	return this.replace(/^\s+/,"");
}
String.prototype.rtrim = function() {
	return this.replace(/\s+$/,"");
}