<!DOCTYPE html><html>?<head>? <title> 事件</title> ?? <script type="text/javascript">?? function count(){? ??? var t1=document.getElementById("txt1"）.value;?? var t2=document.getElementById("txt2"）.value;?? var s=document.getElementById("select").value; ?? var out="";switch (s){?case "+":?out=parseInt(t1)+parseInt(t2);?break;?case "-":?out=parseInt(t1)-parseInt(t2);?break;?case "*":?out=parseInt(t1)*parseInt(t2);?break;?default:?out=parseInt(t1)/parseInt(t2);}?document.getElementById("fruit"）.value=out;?? }? </script> ?</head> ?<body>?? <input type='text' id='txt1' /> ?? <select id='select'>?? ??? ?<option value='+'>+</option>?? ??? ?<option value="-">-</option>?? ??? ?<option value="*">*</option>?? ??? ?<option value="/">/</option>?? </select>?? <input type='text' id='txt2' /> ?? <input type='button' value=' = ' onclick="count()"/> <!--通過 = 按鈕來調(diào)用創(chuàng)建的函數(shù)，得到結(jié)果--> ?? <input type='text' id='fruit' />? ??</body></html>
求解這個(gè)為什么不行呢，謝謝啦QAQ
云浮第一補(bǔ)刀手擐執(zhí)
2016-07-09 20:11:47
