function $() {
var elements = new Array();
for (var i = 0; i < arguments.length; i++) {
var element = arguments[i];
if (typeof element == 'string') element = document.getElementById(element);
if (arguments.length == 1) return element;
elements.push(element);
}
return elements;
}
这个函数应该是用来通过对象的ID获取对象的吧?页面中有个文本框
<input type="text" name="username" size="20" id="username" />为什么我用$('username').value获取不到值呢,弹出的是undefined用$('username').[0].value也一样是undefined
var elements = new Array();
for (var i = 0; i < arguments.length; i++) {
var element = arguments[i];
if (typeof element == 'string') element = document.getElementById(element);
if (arguments.length == 1) return element;
elements.push(element);
}
return elements;
}
这个函数应该是用来通过对象的ID获取对象的吧?页面中有个文本框
<input type="text" name="username" size="20" id="username" />为什么我用$('username').value获取不到值呢,弹出的是undefined用$('username').[0].value也一样是undefined
<input type="text" name="username" size="20" id="username" value="终于不是undefined了"/>再看看
function $() {
var elements = new Array();
for (var i = 0; i < arguments.length; i++) {
var element = arguments[i];
if (typeof element == 'string') element = document.getElementById(element);
if (arguments.length == 1) return element;
elements.push(element);
}
return elements;
}
window.onload=function(){
alert($('username').value)
}
</script>
<input type="text" name="username" size="20" id="username" value="xxx"/>
<form method="post" name="form1" action="admin_edit.asp" onSubmit="return check();">
<input type="hidden" name="action" value="ok" />
<input type="hidden" name="id" value="" />
<tr>
<td class="tl">用户名 <span class="red">*</span></td>
<td><input type="text" name="username" size="20" id="username" value="" /> <span id="msg_username" class="red"></span></td>
</tr>
<tr>
<td class="tl">姓名</td>
<td><input type="text" name="realname" size="20" id="realname" value="" /></td>
</tr>
<tr>
<td class="tl">新登录密码 <span class="red">*</span></td>
<td><input type="password" name="password" size="20" id="password" /> <span id="msg_password" class="red"></span></td>
</tr>
<tr>
<td class="tl">重复新密码 <span class="red">*</span></td>
<td><input type="password" name="cpassword" size="20" id="cpassword" /> <span id="msg_cpassword" class="red"></span></td>
</tr>
<tr>
<td class="tl">管理级别 <span class="red">*</span></td>
<td><select name="adminlevel" id="adminlevel">
<option value="2">普通管理员</option>
<option value="3">超级管理员</option>
</select></td>
</tr>
<tr>
<td class="tl"></td>
<td><input type="submit" name="submit" value=" 确 定 " class="btn"/> <span id="successmsgbox"></span></td>
</tr>
</form>
</table><script type="text/javascript">
function $() {
var elements = new Array();
for (var i = 0; i < arguments.length; i++) {
var element = arguments[i];
if (typeof element == 'string') element = document.getElementById(element);
if (arguments.length == 1) return element;
elements.push(element);
}
return elements;
}
function check() {
alert($('username').value);
return false;
}
window.setTimeout(function(){getID('successmsgbox').innerHTML='';getID('successmsgbox').style.display='none';}, 3000);
</script>
function $() {
var elements = new Array();
for (var i = 0; i < arguments.length; i++) {
var element = arguments[i];
if (typeof element == 'string') element = document.getElementById(element);
if (arguments.length == 1) return element;
elements.push(element);
}
return elements;
}
function check() {
alert($('username').value);
return false;
}//window.setTimeout(function(){getID('successmsgbox').innerHTML='';getID('successmsgbox').style.display='none';}, 3000);</script>
<table cellpadding="2" cellspacing="1" class="tb">
<form method="post" name="form1" action="admin_edit.asp" onSubmit="return check();">
<input type="hidden" name="action" value="ok" />
<input type="hidden" name="id" value="" />
<tr>
<td class="tl">用户名 <span class="red">*</span></td>
<td><input type="text" name="username" size="20" id="username" value="" /> <span id="msg_username" class="red"></span></td>
</tr>
<tr>
<td class="tl">姓名</td>
<td><input type="text" name="realname" size="20" id="realname" value="" /></td>
</tr>
<tr>
<td class="tl">新登录密码 <span class="red">*</span></td>
<td><input type="password" name="password" size="20" id="password" /> <span id="msg_password" class="red"></span></td>
</tr>
<tr>
<td class="tl">重复新密码 <span class="red">*</span></td>
<td><input type="password" name="cpassword" size="20" id="cpassword" /> <span id="msg_cpassword" class="red"></span></td>
</tr>
<tr>
<td class="tl">管理级别 <span class="red">*</span></td>
<td><select name="adminlevel" id="adminlevel">
<option value="2">普通管理员</option>
<option value="3">超级管理员</option>
</select></td>
</tr>
<tr>
<td class="tl"></td>
<td><input type="submit" name="submit" value=" 确 定 " class="btn"/> <span id="successmsgbox"></span></td>
</tr>
</form>
</table>
我测试过了,把function $()放到页面里正常,放到当度的js文件里再引入进来就不行,同一个js文件里的其他函数是有用了,证明路径没问题,郁闷...