<body><div class="reg"><form><div class="a">手機號<input type="number" value="" id="num" class="num" ?onmouseout="try()"/></div><div class="b">郵箱<input type="text" value="" class="email" id="email" onmouseout="try2()"/></div><div class="c"><input type="submit" value="登錄" class="login" /></div></form></div><script>var num=document.getElementById(num);var email=document.getElementById(email);?function try() { if(num.length>10){ alert("請輸入正確的電話號碼") }}?function try2() { if(email.indexOf("@")<0){ alert("請輸入正確的郵箱地址") }}</script></body>這樣寫js是不是不對？怎么都沒效果呢？請大神指點?。?
為什么這段代碼運行不起來？關于js
慕用7797256
2018-03-17 16:14:06
