Hide Or Mask Characters In Display Message

[ppbb123]

Hi, I use this method to display the last 4 characters in a result column .

 

In a HTML Block: 

<script>
    var str = "[@field:area]"; // get the value of area field
    var res = str.slice(-4);  // get the last four characters of area field
    document.write(res);  // display
</script>

 

How to display the same thing in details page? I cannot use HTML Block because the style looks different. 

 

[HongTaiLang]

If the field is "Display Only", the value will be displayed around <span> tags. You can get the value by span tag and replace it. 

 

<script>
var col = document.getElementsByTagName('span');
var x = col[1].innerHTML;  // if the field is second "Display Only" field on that page
col[1].innerHTML = x.slice(-4);
</script>