scroll to contents in jQuery / CSS -

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मैं jQuery में एक सरल चयन बॉक्स बना रहा था। स्क्रॉलिंग ।

मुझे ul ऊंचाई अतिप्रवाह सेट करने की आवश्यकता है, जिससे कि मेरे पास हो सके एक स्क्रॉलबार।

कृपया jsfiddle देखें:

jsFiddle पर आप देख सकते हैं कि onKeyDown (keyBoard down arrow) चयन नीचे जाएंगे।

ऐसा लगता है कि मैं कुछ गलत कर रहा हूं, कृपया मेरी सहायता करें।

धन्यवाद।

अपडेट करें:

दोस्तों, कृपया समझें कि दी गई उदाहरण बेला केवल एक उदाहरण है वास्तविक एक भिन्न है। मैंने अपना बेला अपडेट किया है।

आपका मार्कअप अमान्य है: 

  & lt; li वर्ग = "विकल्प चालू" & gt; विकल्प 1 & lt; li & gt;   
 आप ठीक से  li  बंद नहीं कर रहे हैं होना चाहिए:  
  & lt; li वर्ग = "विकल्प चालू" & gt; विकल्प 1 & lt; / li & gt;   
  
  संपादित करें  तुम्हारा अंत करने के लिए इस बिट का jQuery कोड जोड़ें:  
  $ ( "#select")। चेतन ({scrollTop: $ ("वर्तमान।") ऑफसेट ()। शीर्ष}, 100);   
 इसे आपको एक विचार देना चाहिए।

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