Array.prototype.indexOf = function(item){
	var temp = this;
	for (var i=0; i < temp.length; i++) {
		if (temp[i] == item) return i;
	};
	return -1;
}
String.prototype.blank = function(){
	return this == "";
}
String.prototype.trim = function(){ 
	return this.replace(/\s+$/g,"");
}