//Gets the browser specific XmlHttpRequest Object
function getXmlHttpRequestObject() {
if (window.XMLHttpRequest) {
return new XMLHttpRequest(); //Mozilla, Safari ...
} else if (window.ActiveXObject) {
return new ActiveXObject("Microsoft.XMLHTTP"); //IE
} else {
//Display our error message
alert("Your browser doesn't support the XmlHttpRequest object.");
}
}
//Our XmlHttpRequest object
var receiveReq = getXmlHttpRequestObject();
//Initiate the AJAX request
function makeRequest(url, param) {
//If our readystate is either not started or finished, initiate a new request
if (receiveReq.readyState == 4 || receiveReq.readyState == 0) {
//Set up the connection to captcha_test.html. True sets the request to asyncronous(default)
receiveReq.open("POST", url, true);
//Set the function that will be called when the XmlHttpRequest objects state changes
receiveReq.onreadystatechange = updatePage;
receiveReq.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
receiveReq.setRequestHeader("Content-length", param.length);
receiveReq.setRequestHeader("Connection", "close");
//Make the request
receiveReq.send(param);
}
}
//Called every time our XmlHttpRequest objects state changes
function updatePage() {
//Check if our response is ready
if (receiveReq.readyState == 4) {
//Set the content of the DIV element with the response text
document.getElementById('result').innerHTML = receiveReq.responseText;
//Get a reference to CAPTCHA image
img = document.getElementById('imgCaptcha');
//Change the image
img.src = '/EWFormUtility/create_image.php?' + Math.random();
}
}
//Called every time when form is perfomed
function getParam(theForm) {
//Set the URL
var url = '/EWFormUtility/captcha.php';
//Set up the parameters of our AJAX call
var postStr = theForm.txtCaptcha.name + "=" + encodeURIComponent( theForm.txtCaptcha.value );
//Call the function that initiate the AJAX request
makeRequest(url, postStr);
}
/**
*width=180&height=60&letter_count=5&min_size=35&max_size=45&noise=500&noiselength=9&bcolor=cccced&border=000000\"
*/
/**
*A convenience method to set a Captcha challenge inside a form.
*
*Note this currently adds a row of a table. A better solution is in order.
*
* place a Captcha object in a form within a page. The default arguments are set here
* $formname is not optional, all other arguments are optional. ---required for the ajax implementation-- which is removed here.
* The advantage of using this method is an easy way to set the variables for the image.
* @input name="txtCaptcha"
*/
function printCatcha($width, $height, $letter_count, $min_size, $max_size, $noise, $noiselength, $bcolor) {
if(typeof $width === undefined || $width === undefined) $width = 180;
if(typeof $height === undefined ||$height === undefined) $height = 60;
if(typeof $letter_count === undefined || $letter_count === undefined) $letter_count = 5;
if(typeof $min_size === undefined ||$min_size === undefined) $min_size = 35;
if(typeof $max_size === undefined ||$max_size === undefined) $max_size = 45;
if(typeof $noise === undefined || $noise === undefined ) $noise = 300;
if(typeof $noiselength === undefined || $noiselength === undefined) $noiselength = 5;
if(typeof $bcolor === undefined ||$bcolor === undefined) $bcolor = "ffffff";
document.write(" ");
document.write("Enter Security Code ");
document.write (" ");
document.write(" ");
}