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這個根據(jù)身份證號碼輸出生日，運行不起來?，是為啥，求高人指點

JavaScript

菜鳥歌 2016-07-26 16:56:28

<!DOCTYPE HTML><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>prompt</title>? <script type="text/javascript">?function discriCard(){ ??? var UUserCard = prompt("請輸入你的身份證號碼"); ??? var tmpStr= "";??? var birthday= "";??? var strReturn= "";??? alert(0);??? var birthday=document.getElementById("UUserCard "); ??????????? if (UUserCard.length==15) ??????????? {??????????????? tmpStr = birthday.substring(6, 12);??????????????? tmpStr = "19" + tmpStr;??????????????? tmpStr = tmpStr.substring(0, 4) + "-" + tmpStr.substring(4, 6) + "-" + tmpStr.substring(6);??????????????? document.write(tmpStr);??????????? }??????????????? else {??????????????? tmpStr = birthday.substring(6, 14);??????????????? tmpStr = tmpStr.substring(0, 4) + "-" + tmpStr.substring(4, 6) + "-" + tmpStr.substring(6);??????????????? document.write(tmpStr);}??????????? }? </script></head><body>??? <input name="button" type="button" onClick="discriCard()" value="點擊我，輸入身份證號!" /></body></html>

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1 回答

已采納

luofuxiang

TA貢獻34條經(jīng)驗獲得超34個贊

????調(diào)試了一下樓主的代碼，發(fā)現(xiàn)有一處存在問題，UUserCard 只是一個變量，而不是某個標簽的ID，所以不需要調(diào)用getElementByID來獲取其值，直接var birthday=UUserCard;即可，代碼已經(jīng)改過調(diào)試好了，只改了一行，有注釋，樓主可以參考一下。

<!DOCTYPE?HTML>
<html>
<head>
<meta?http-equiv="Content-Type"?content="text/html;?charset=utf-8"?/>
<title>prompt</title>
??<script?type="text/javascript">

?function?discriCard(){?
????var?UUserCard?=?prompt("請輸入你的身份證號碼");?
????var?tmpStr=?"";
????var?birthday=?"";
????var?strReturn=?"";
????alert(0);
????//var?birthday=document.getElementById("UUserCard?");?改為
	var?birthday=UUserCard;
	
????????????if?(UUserCard.length==15)?
????????????{
????????????????tmpStr?=?birthday.substring(6,?12);
????????????????tmpStr?=?"19"?+?tmpStr;
????????????????tmpStr?=?tmpStr.substring(0,?4)?+?"-"?+?tmpStr.substring(4,?6)?+?"-"?+?tmpStr.substring(6);
????????????????document.write(tmpStr);
????????????}
????????????????else?{
????????????????tmpStr?=?birthday.substring(6,?14);
????????????????tmpStr?=?tmpStr.substring(0,?4)?+?"-"?+?tmpStr.substring(4,?6)?+?"-"?+?tmpStr.substring(6);
????????????????document.write(tmpStr);}
????????????}
??</script>
</head>
<body>
????<input?name="button"?type="button"?onClick="discriCard()"?value="點擊我，輸入身份證號!"?/>
</body>
</html>

反對回復 2016-07-26