Remove a character in a string at position

This is a function to remove the character at position i out of string inStr.

function removeCharAt(inStr, i) {
  if (inStr==undefined) return "";
  var tempStr = "";
  if (inStr.length >= i) {
    for (var x=0; x<inStr.length; x++)
    if (x!=i) tempStr += inStr.charAt(x);
    return tempStr;
  }
  return "";
}