fix bug

apps/course/Tpl/default/Video/view_w3g.html

@@ -148,7 +148,7 @@
 			onBuy: function() {
 			onBuy: function() {
 				if (uid <= 0) {
 				if (uid <= 0) {
 				    ui.confirm('请先登录', {
 				    ui.confirm('请先登录', {
-				        yes: that.onLogin
+				        yes: this.onLogin
 				    })
 				    })
 				} else {
 				} else {
 					this.onToBuy()
 					this.onToBuy()