javascript如何动态修改层中内容?
<scriptlanguage="javascript">functionthepswdck(){varthepswd=document.getElementById("...
<script language="javascript">
function thepswdck()
{
var thepswd=document.getElementById("pswd").value;
var pswddiv=document.getElementById("mima");//此为div
if(thepswd==" ")
var oP=document.createElement("LABEL");
var oText=document.createTextNode("输入密码:");
oP.appendChild(oText);
pswddiv.appendChild(oP);
}
</script>
</head>
<body>
<div id="mima">
请输入密码:<input type="text" id="pswd"/>
<button onclick="thepswdck()">提交</button>
</div>
</body> 展开
function thepswdck()
{
var thepswd=document.getElementById("pswd").value;
var pswddiv=document.getElementById("mima");//此为div
if(thepswd==" ")
var oP=document.createElement("LABEL");
var oText=document.createTextNode("输入密码:");
oP.appendChild(oText);
pswddiv.appendChild(oP);
}
</script>
</head>
<body>
<div id="mima">
请输入密码:<input type="text" id="pswd"/>
<button onclick="thepswdck()">提交</button>
</div>
</body> 展开
2个回答
展开全部
if(thepswd==" ") 除了引号里的空格去掉后,还要加{}
function thepswdck()
{
var thepswd=document.getElementById("pswd").value;
var pswddiv=document.getElementById("mima");//此为div
if(thepswd=="")
{
var oP=document.createElement("LABEL");
var oText=document.createTextNode("输入密码:");
oP.appendChild(oText);
pswddiv.appendChild(oP);
}
}
function thepswdck()
{
var thepswd=document.getElementById("pswd").value;
var pswddiv=document.getElementById("mima");//此为div
if(thepswd=="")
{
var oP=document.createElement("LABEL");
var oText=document.createTextNode("输入密码:");
oP.appendChild(oText);
pswddiv.appendChild(oP);
}
}
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