SparX

Hello everyone! I need someone to tell me what's wrong with this script:

function stringToArray(string){
			var sVector = [string.split];
			var iR;

			for (i=0;i<=sVector.length;i++)
				iR = sVector;
			
			return iR;

		}


		function stringEncode(string){
			var vector = string.split("");
			var iR;
			for (i=0;i<=string.length;i++){
				iR += string.charCodeAt(i);
			

			}return iR;
		}


			window.onload = function (){
				document.getElementById('clickButton').onclick = function(){
					alert(stringEncode(document.getElementById('textEr').value));
				}
			}

I try to define a function that encodes a simple string, but it returns "NaN" instead of numbers.

Thanks in advance.