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JS Enter the year, and then enter the month, how many days does the month pop up?

Source: Internet
Author: User
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<!DOCTYPE HTML><HTML>    <Head>        <MetaCharSet= "UTF-8">        <title></title>    </Head>    <Body>    </Body></HTML><Scripttype= "Text/javascript">    varNian=Number (Prompt ("Please enter the year")); varYue=Number (Prompt ("Please enter the month")); if(Yue==1 ||Yue==3 ||Yue==5 ||Yue==7 ||Yue==9||Yue== One) {alert ("31 Days"); }        Else if(Yue==2)        {                        if((Nian% 4 == 0) &&(Nianfen%  - != 0) {alert (Nian+"Swiss Year"+"29 Days"); }            Else if(!(Nian%  - == 0) {alert (Nian+"Swiss Year"+"29 Days"); }            Else{alert (Nian+"Common year"+"28 Days"); }        }        Else{alert ("30 Days"); }</Script>

JS Enter the year, and then enter the month, how many days does the month pop up?

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