ajax validate form check

来源：互联网发布：centos 编译安装php 编辑：程序博客网时间：2024/05/16 04:53

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
   <title>一个常用的Ajax表单验证程序
- www.webdm.cn</title>
<style type="text/css">
form {
width:500px;
border:1px solid #ccc;
}
fieldset {
border:0;
padding:10px;
margin:10px;
position:relative;
}
label {
display:block;
font:normal 12px/17px verdana;
}
input {width:160px;}
span.hint {
font:normal 11px/14px verdana;
background:#eee url(http://www.webdm.cn/images/20100411/bg-span-hint-gray.gif) no-repeat top left;
color:#444;
border:1px solid #888;
padding:5px 5px 5px 40px;
width:250px;
position:absolute;
margin: -12px 0 0 14px;
display:none;
}

fieldset.welldone span.hint {
background:#9fd680 url(http://www.webdm.cn/images/20100411/bg-span-hint-welldone.jpg) no-repeat top left;
border-color:#749e5c;
color:#000;
}
fieldset.kindagood span.hint {
background:#ffffcc url(http://www.webdm.cn/images/20100411/bg-span-hint-kindagood.jpg) no-repeat top left;
border-color:#cc9933;
}

fieldset.welldone {
background:transparent url(http://www.webdm.cn/images/20100411/bg-fieldset-welldone.gif) no-repeat 194px 19px;
}
fieldset.kindagood {
background:transparent url(http://www.webdm.cn/images/20100411/bg-fieldset-kindagood.gif) no-repeat 194px 19px;
}

</style>

<script type="text/javascript">
function checkUsernameForLength(whatYouTyped) {
var fieldset = whatYouTyped.parentNode;
var txt = whatYouTyped.value;
if (txt.length > 5) {
fieldset.className = "welldone";
}
else {
fieldset.className = "";
}
}
function checkPassword(whatYouTyped) {
var fieldset = whatYouTyped.parentNode;
var txt = whatYouTyped.value;
if (txt.length > 3 && txt.length < 8) {
fieldset.className = "kindagood";
} else if (txt.length > 7) {
fieldset.className = "welldone";
} else {
fieldset.className = "";
}
}
function checkEmail(whatYouTyped) {
var fieldset = whatYouTyped.parentNode;
var txt = whatYouTyped.value;
if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(txt)) {
fieldset.className = "welldone";
} else {
fieldset.className = "";
}
}
function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
   window.onload = func;
  } else {
   window.onload = function() {
   oldonload();
   func();
   }
  }
}

// http://www.webdm.cn
function prepareInputsForHints() {
  var inputs = document.getElementsByTagName("input");
  for (var i=0; i<inputs.length; i++){
   inputs[i].onfocus = function () {
   this.parentNode.getElementsByTagName("span")[0].style.display = "inline";
   }
   inputs[i].onblur = function () {
   this.parentNode.getElementsByTagName("span")[0].style.display = "none";
   }
  }
}
addLoadEvent(prepareInputsForHints);
</script>
</head>
<body>
<form
action="#"
name="basicform"
id="basicform" >
<fieldset>
<label for="username">用户名:</label>
<input
type="text"
id="username"
onkeyup="checkUsernameForLength(this);" />
<span class="hint">用户名最低6位哦</span>
</fieldset>

<fieldset>
<label for="password">密码:</label>
<input
type="password"
id="password"
onkeyup="checkPassword(this);" />
<span class="hint">密码需要4到8位哦</span>
</fieldset>

<fieldset>
<label for="email">Email地址:</label>
<input
type="text"
id="email"
onkeyup="checkEmail(this);" />
<span class="hint">You can enter your real address without worry - we don't spam!</span>
</fieldset>
</form>

<br />

</body>
</html>