发表时间:2015-11-06来源:网络
演示如何给文本框设置只读属性,教你方法是什么,其实很简单,在文本框属性内再增加 readonly="true"其实就可以了,意思是"只读"=真,用户在文本框上不能输入也不能修改原有的字符.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <title>设置文本框的只读属性-www.zhishiwu.com站长入门频道</title> <script type="text/javascript"> function Mycheck(){ if (document.form1.UserName.readOnly){ alert("用户名文本框为只读属性!");return false; } else return return true; } </script> </head> <body style="font-size:12px"> <table width="783" height="477" border="0" align="center" cellpadding="0" cellspacing="0"> <tr> <td width="210" height="111"> </td> <td width="573"> </td> </tr> <tr> <td height="273"> </td> <td align="center" valign="middle"><table width="90%" border="0" cellspacing="2" cellpadding="3"> <form name="form1"> <tr> <td width="99" align="left">用户名:</td> <td width="399" align="left"><input name="UserName" type="text" id="UserName" value="future" readonly="true" onKeyDown="Mycheck()" onMouseup="Mycheck()"></td> </tr> <tr> <td width="99" align="left">密码:</td> <td align="left"><input type="text" name="textfield2" value="future2010" readonly="true"></td> </tr> <tr> <td width="99" align="left">其它信息:</td> <td align="left"><input name="textfield4" type="text" size="35" value="这里不能修改" readonly="true"></td> </tr> <tr> <td width="99" align="left">用户等级:</td> <td align="left"><select name="Ugrade" id="Ugrade"> <option value="1">新进成员</option> <option value="2">斑竹</option> </select></td> </tr> <tr> <td width="99" align="left">是否锁定:</td> <td align="left"><input type="radio" name="Ufig" value="1"> 是 <input name="Ufig" type="radio" value="0" checked> 否</td> </tr> <tr> <td align="left"> </td> <td align="left"><input name="edit" type="submit" class="button" id="edit" value="修 改"> </td> </tr> </form> </table></td> </tr> <tr> <td> </td> <td> </td> </tr> </table> </body> </html>
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