Question

I have a JavaScript function code where I want to alert.

function msg(x,y)
{
 tempstr = x.value
if(tempstr.length>y)
 {
  alert(c_AcknowledgementText);
  x.value = tempstr.substring(0,y);
  }
}

Now I have an xml with below format:

<?xml version="1.0" encoding="utf-8" ?>
<root>
    <key name="c_ContactUsHeading">Contact Us</key>
    <key name="c_AcknowledgementText">Comments can not be more than 250 characters.</key>
</root>

I want the JavaScript code so that the message shown in above alert can be read from above xml key name “c_AcknowledgementText”.

I hope it is clear about my problem.

Answer 1

Basically, you want to use XMLHttpRequest. Not sure what you’re trying to do with tempstr, etc., though.

function msg(x,y)
{
    tempstr = x.value;
    if(tempstr.length>y)
    {
        var req = new XMLHttpRequest();
        req.open('GET', '/file.xml', true);
        req.onreadystatechange = function (aEvt) {
            if (req.readyState == 4) {
                if(req.status == 200)
                {
                    var keys = req.responseXML.getElementsByTagName("key");
                    for(var i = 0; i < keys.length; i++)
                    {
                        var key = keys[i];
                        if(key.getAttribute("name") == "c_AcknowledgementText")
                        {
                            alert(key.textContent);
                            break;
                        }
                    }
                }
                else  
                    alert("Error loading page\n");

                  }
      };
      req.send(null);
      x.value = tempstr.substring(0,y);
    }
}