object.js
String.prototype.rTrim = string_RTrim;
function string_RTrim(VALUE){
	var w_space = String.fromCharCode(32);
	var v_length = VALUE.length;
	var strTemp = "";
	if(v_length < 0){
		return"";
	}
	var iTemp = v_length -1;

	while(iTemp > -1){
		if(VALUE.charAt(iTemp) == w_space){
		}
		else{
			strTemp = VALUE.substring(0,iTemp +1);
			break;
		}
		iTemp = iTemp-1;
	} //End While
	return strTemp;

} //End Function

Validate.js file:
//import object.js // is this possible or any way?

function Validate(targetVal){
  //I want to use following
  var aResult = targetVal.rTrim();
}