<!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="Generator" content="EditPlus?"> <meta name="Author" content=""> <meta name="Keywords" content=""> <meta name="Description" content=""> <title>聚焦离焦事件</title> </head> <script type="text/javascript"> <!-- function fun(obj,e){ //拿到按键的asc码 var key = e.keyCode; obj.value = key; } //--> </script> <body> <input type="text" name="" onkeypress = "fun(this,event)"> <!--显示按键的ascii--> </body> </html>
提交事件
<!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="Generator" content="EditPlus?"> <meta name="Author" content=""> <meta name="Keywords" content=""> <meta name="Description" content=""> <title>提交事件</title> </head> <script type="text/javascript"> <!-- function check(form){ //拿到文本框中的内容 var txt = form.username.value; //判断内容 if(txt == ""){ document.getElementById("sname").innerHTML = "<font color = red>姓名必填</font>"; form.username.focus(); return false; } return true; } //--> </script> <body> <form method = "post" action="2.html" onsubmit = "return check(this)"> 姓名:<input type="text" name="username"><span id="sname"></span><br> <input type="submit" value="提交"> </form> </body> </html>
原文：http://www.cnblogs.com/taiguyiba/p/6188571.html