html页面:
<form action="list.html" method="post" onsubmit="return check()"> <input type="text" id="mid" > </form>
js代码:
function check(){ if($("#mid").val==""){ alert("不能为空"); return false; } return true; }
html页面:
<form action="list.html" method="post" onsubmit="return check()"> <input type="text" id="mid" > </form>
js代码:
function check(){ if($("#mid").val==""){ alert("不能为空"); return false; } return true; }