// Javascript from Moodle modules
wrs_addEvent(window, 'load', function () {
    wrs_imageAlignFix();
});
/* Image align bug: "align" attribute is not standard, so there are browsers that does not support it. */
function wrs_imageAlignFix() {
    var images = document.getElementsByTagName('img');
	
    for (var i = images.length - 1; i >= 0; --i) {
        if (images[i].className == 'Wirisformula') {
            images[i].style.verticalAlign = (-images[i].height / 2) + 'px';
        }
    }
}
/* Tools */
/**
 * Cross-browser addEventListener/attachEvent function.
 * @param object element Element target
 * @param event event Event
 * @param function func Function to run
 */
function wrs_addEvent(element, event, func) {
    if (element.addEventListener) {
        element.addEventListener(event, func, false);
    }
    else if (element.attachEvent) {
        element.attachEvent('on' + event, func);
    }
}function getClasses(element) {
	if (document.getElementById(element).getAttribute("class")) return document.getElementById(element).getAttribute("class");
	else return document.getElementById(element).getAttribute("className");
}

function toggleClass(element,c1,c2) {
  var classes = getClasses(element).split(" ");
  
  for (i=0; i<classes.length; i++) {
    if (classes[i] == c1) classes[i] = c2;
    else if (classes[i] == c2) classes[i] = c1;
  }
  
	document.getElementById(element).setAttribute("class", classes.join(" "));
	document.getElementById(element).setAttribute("className", classes.join(" "));
}