function getCheckedValue(radioObj) {
	if(!radioObj)
		return "";
	var radioLength = radioObj.length;
	if(radioLength == undefined)
		if(radioObj.checked)
			return radioObj.value;
		else
			return "";
	for(var i = 0; i < radioLength; i++) {
		if(radioObj[i].checked) {
			return radioObj[i].value;
		}
	}
	return "";
}


function showPrice() {

    var obj = document.course_form.charged;

    // SET TYPE INT
    var value = getCheckedValue(obj);
   
    if (value == 1) {
        document.getElementById("price_heading").style.display = "block";
        document.getElementById("price_field").style.display = "block";

    }
    else {
        document.getElementById("price_heading").style.display = "none";
        document.getElementById("price_field").style.display = "none";
    }
}

function eraseDefault(id_element, text) {

    var id_element;
    var text;
    var obj;

    var obj = document.getElementById(id_element);

    if (obj.innerHTML == text) {

        // CLEAR TEXTAREA
        obj.innerHTML = '';

        // SET FONT COLOR
        obj.style.color = 'black';
    }
   
}
function change_visibility(id_element, status) {
    var id_element;
    var status;

    var obj = document.getElementById(id_element);

    obj.style.display = status;

}