Merge pull request #340 from ChrisLin1997/feature/js-746

添加0746.使用最小花费爬楼JavaScript版本

problems/0746.使用最小花费爬楼梯.md

@@ -255,7 +255,18 @@ func min(a, b int) int {
 }
 ```
 
-
+Javascript：
+```Javascript
+var minCostClimbingStairs = function(cost) {
+    const dp = [ cost[0], cost[1] ]
+    
+    for (let i = 2; i < cost.length; ++i) {
+        dp[i] = Math.min(dp[i -1] + cost[i], dp[i - 2] + cost[i])
+    }
+    
+    return Math.min(dp[cost.length - 1], dp[cost.length - 2])
+};
+```
 
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 * 作者微信：[程序员Carl](https://mp.weixin.qq.com/s/b66DFkOp8OOxdZC_xLZxfw)