Simple parser for AND and OR to javascript regular script

queryParser.js

/*
* input = "apple AND orange"; re = "(?=apple)(?=orange)"
* input = "apple OR orange"; re = "apple|orange"
*/
function queryParser (input) {
  var re = ''
	input = input.split(' ')
	for (var i=0; i<input.length; ++i) {

		if (input[i] !== 'AND' &&
			input[i] !== 'OR' &&
			input[i] !== '') {
			input[i] = '(?=.*'+input[i]+')'
		}

		input[i] = (input[i] == 'AND') ? '': input[i]
		input[i] = (input[i] == 'OR') ? '|': input[i]
		re += input[i]
	}

	return re
}