javascript in jsf/icefaces

Question

I have file with jspx extension i write javascript like

function isNumber(inputId){

            var value = document.getElementById(\'mainForm:\'+ inputId)         


        

Answer 1

Enclose your Javascript in CDATA Sections:

<script language="javascript" type="text/javascript">
/* <![CDATA[ */

    function isNumber(inputId){

            var value = document.getElementById('mainForm:'+ inputId).value;
            var  s = value.length;

            while(s >= 0){
                var c = value.charAt(s);
                if(c > "9"){
                    alert("Value must be digit");
                    document.getElementById('mainForm:'+ inputId).value = "";
                    document.getElementById('mainForm:'+ inputId).focus();
                    return false;
                }
                s --;
            }
            return true;
        }

        //Code containing "<" also comes in this section

/* ]]> */
</script>

Answer 2

Besides the escaping and CDATA answers:

If you want to check if a value is a number, there is a javascript built-in function for that: isNaN

Here is an example:

if (isNaN(document.getElementById('mainForm:'+ inputId).value))
  {
    alert("Please enter digits");
    document.getElementById(obj).focus();
    document.getElementById(obj).select();
    return false;
  }

Answer 3

As explained by Matt Handy, you could not use the < or > sign in your JSPX, as this is a XML format. You have three solutions regarding your problem:

• Escape by using < or >.
• Use <![CDATA[ ... ]]> to hold your JavaScript code in your page.
• Set your JavaScript code in a separate .js file, and load it in your JSPX page.