【www.gdgbn.com--文本特效】

<%@ register src="~/uc/xwtreedropdownlist/xwtreedropdownlist.ascx" tagprefix="uc"
    tagname="xwtreedropdownlist" %>


   


   

   
       
           
                 
           
           
                newreadonly
           
           
                readonly
           
           
                disabled
           
       
       
           
                asp教程:textbox
           
           
                                    oncut="return false" text="txtnewreadonly1">
           
           
               
           
           
               
           
       
       
           
                input:text
           
           
                                    oncut="return false" value="txtnewreadonly2" />
           
           
               
           
           
               
           
       
   
   
   
   

<script type="text/网页特效">
    function changetxtvalue() {
        document.getelementbyid("txtnewreadonly1").value = "txtnewreadonly1" + new date().gettime();
        document.getelementbyid("txtreadonly1").value = "txtreadonly1" + new date().gettime();
        document.getelementbyid("txtdisabled1").value = "txtdisabled1" + new date().gettime()
        document.getelementbyid("txtnewreadonly2").value = "txtnewreadonly2" + new date().gettime();
        document.getelementbyid("txtreadonly2").value = "txtreadonly2" + new date().gettime();
        document.getelementbyid("txtdisabled2").value = "txtdisabled2" + new date().gettime()
    }
</script>

        protected void button1_click( object sender, eventargs e )
        {
            response.write( "asp:textbox
" );
            response.write( string.format( "txtnewreadonly1: {0}
", request.form[ "txtnewreadonly1" ] ) );
            response.write( string.format( "txtreadonly1: {0}
", request.form[ "txtreadonly1" ] ) );
            response.write( string.format( "txtdisabled1: {0}
", request.form[ "txtdisabled1" ] ) );

            response.write( "
" );

            response.write( "input:text
" );
            response.write( string.format( "txtnewreadonly2: {0}
", request.form[ "txtnewreadonly2" ] ) );
            response.write( string.format( "txtreadonly2: {0}
", request.form[ "txtreadonly2" ] ) );
            response.write( string.format( "txtdisabled2: {0}
", request.form[ "txtdisabled2" ] ) );
        }

1、readonly只针对input(text/password)和textarea有效，而disabled对于所有的表单元素有效，包括select，radio,checkbox,button等。

    2、在表单元素使用了disabled后，我们将表单以post或者get的方式提交的话，这个元素的值不会被传递出去，而readonly会将该值传递出去。    

    需要一个这样的文本框，不能手工更改内容，但js可以，也可以回传。

本文来源：http://www.gdgbn.com/wangyetexiao/29032/