JavaScript中this的使用

icyheart · 发表于 2013-2-7 19:45:37

<!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 > Choose your favorite Beatle:<input type="radio" name="Beatles" value="John Lennon" checked/>John <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..." /> </form> </body> </html>

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