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Create valid_palindrome.js

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	`1`	`+/**`
	`2`	`+ * @param {string} s`
	`3`	`+ * @return {boolean}`
	`4`	`+ */`
	`5`	`+var isPalindrome = function(s) {`
	`6`	`+ s = s.replace(/[^A-Za-z0-9]/g, '').toLowerCase();`
	`7`	`+`
	`8`	`+ let left = 0;`
	`9`	`+ let right = s.length - 1;`
	`10`	`+`
	`11`	`+ while(left <= right) {`
	`12`	`+ if (s[left] === s[right]) {`
	`13`	`+ left++;`
	`14`	`+ right--;`
	`15`	`+ } else return false;`
	`16`	`+ }`
	`17`	`+`
	`18`	`+ return true;`
	`19`	`+};`

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