1、判斷輸入的是不是郵件
2、判斷輸入的是不是一個數
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><title>ggggg</title><link rel="stylesheet" type="text/css" href=""><meta http-equiv="content-type" content="text/html;charset=utf-8"><!--js代碼可以放置在任意位置，按照先後順序依次執行 一般放在head標籤之間--><script type="text/javascript"> function test(){ var con=document.getElementById("inp").value; //window.alert(con); var regExp=/^[a-zA-Z_]+[a-zA-Z0-9-]*@([a-zA-Z0-9]+\.)+(com|cn|org|net)$/; if(regExp.test(con)){ window.alert("是郵件"); }else{ window.alert("不是郵件"); } } function test2(){ var num=document.getElementById("num").value; //window.alert(con); var regExp=/^[0-9-]+(\.)?([0-9]+)$/; if(regExp.test(num)){ window.alert("是數"); }else{ window.alert("不是數"); } }</script></head><body> <input id="inp" type="text" /><input type="button" value="test" onclick="test()"><br/> <input id="num" type="text" /><input type="button" value="test" onclick="test2()"> </body></html>
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