用简单的代码写出效率高的程序
- <!--这个程序使用了javascript中的this,this可以减少很多不必要的代码量,并且提高代码的效率-->
- <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
- <html>
- <head>
- <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
- <title>Untitled Document</title>
- <script language="javascript">
- function processData(form){
- for (var i = 0; i < form.Beatles.length; i++) {
- if (form.Beatles[i].checked) {
- break;
- }
- }
- var beatle = form.Beatles[i].value;
- var song = form.song.value;
- alert("Checking whether"+" "+ song+" "+ "features"+" "+ beatle+" "+ "...");
- }
- function verifySong(entry){//这里的entry是随便起的也可以叫别的名
- var song = entry.value;
- alert("Checking whether" +" "+ song+" " + "is a Beatles tune...");
- }
- </script>
- </head>
- <body>
- <form onSubmit="return false">
- Choose your favorite Beatle:
- <input type="radio" name="Beatles" value="John Lennon" checked/>John <!--看到这里的checked了吧可以这样太简单了-->
- <input type="radio" name="Beatles" value="Paul McCartney"/>Paul
- <input type="radio" name="Beatles" value="George Harrison"/>George
- <input type="radio" name="Beatles" value="Ringo Starr"/>Ringo
- <p>
- Enter the name of your favorite Beatles song:
- <br>
- <input type="text" name="song" value="Eleanor Rigby" onChange="verifySong(this)"/>
- <p>
- <input type="button" name="process" value="Process Request..." onClick="processData(this.form)"/>
- <!--因为这个按钮是要提交表单的,直接将form传到指定的函数中-->
- </form>
- </body>
- </html>
哈哈 看到了吧 简单吧