javascript中怎么动态设置文本框的只读性
日期：2014-05-18 浏览次数：20754 次
javascript中如何动态设置文本框的只读性
如何动态设置文本框的只读属性？
比如在form里有一个下拉框和文本框，当下拉框的值变化时，动态的设置文本框的只读性?在javascript的函数中使用 document.formname.textname.readonly = " ";没有用.
那位高手帮忙解决一下？？
------解决方案--------------------
<%@ page language= "java " import= "java.util.* " pageEncoding= "GBK "%>
<html>
<head>
<title> </title>
<script type= "text/javascript ">
function change(s)
{
document.getElementById( "t ").value=s;
}
</script>
</head>
<body>
<FORM METHOD= "POST " ACTION= " ">
<INPUT TYPE= "text " id= "t " readonly= "readonly ">
<select onchange= "change(this.value); ">
<OPTION VALUE= "aaa " SELECTED> aaa </OPTION>
<OPTION VALUE= "bbb "> bbb </OPTION>
</SELECT>
</FORM>
</body>
</html>
------解决方案--------------------
<html xmlns= "http://www.w3.org/1999/xhtml ">
<head>
<meta http-equiv= "Content-Type " content= "text/html; charset=shift_jis " />
<title> 无标题文档 </title>
<script language= "javascript ">
function setText(obj)
{
var valsel = obj.value;
var textid = document.getElementById( "textfield ");
if(valsel == "1 ")
textid.disabled = true;
else
textid.disabled = false;
}
</script>
</head>
<body>
<form name= "form1 " id= "form1 " method= "post " action= " ">
<input type= "text " name= "textfield " />
<select name= "select " size= "1 " onchange= "setText(this); ">
<option value= "1 "> Yes </option>
<option value= "2 "> NO </option>
</select>
</form>
</body>
</html>
------解决方案--------------------
document.formname.textname.readOnly = true;
如何动态设置文本框的只读属性？
比如在form里有一个下拉框和文本框，当下拉框的值变化时，动态的设置文本框的只读性?在javascript的函数中使用 document.formname.textname.readonly = " ";没有用.
那位高手帮忙解决一下？？
------解决方案--------------------
<%@ page language= "java " import= "java.util.* " pageEncoding= "GBK "%>
<html>
<head>
<title> </title>
<script type= "text/javascript ">
function change(s)
{
document.getElementById( "t ").value=s;
}
</script>
</head>
<body>
<FORM METHOD= "POST " ACTION= " ">
<INPUT TYPE= "text " id= "t " readonly= "readonly ">
<select onchange= "change(this.value); ">
<OPTION VALUE= "aaa " SELECTED> aaa </OPTION>
<OPTION VALUE= "bbb "> bbb </OPTION>
</SELECT>
</FORM>
</body>
</html>
------解决方案--------------------
<html xmlns= "http://www.w3.org/1999/xhtml ">
<head>
<meta http-equiv= "Content-Type " content= "text/html; charset=shift_jis " />
<title> 无标题文档 </title>
<script language= "javascript ">
function setText(obj)
{
var valsel = obj.value;
var textid = document.getElementById( "textfield ");
if(valsel == "1 ")
textid.disabled = true;
else
textid.disabled = false;
}
</script>
</head>
<body>
<form name= "form1 " id= "form1 " method= "post " action= " ">
<input type= "text " name= "textfield " />
<select name= "select " size= "1 " onchange= "setText(this); ">
<option value= "1 "> Yes </option>
<option value= "2 "> NO </option>
</select>
</form>
</body>
</html>
------解决方案--------------------
document.formname.textname.readOnly = true;
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