// JScript File

 
function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
} 
function addCss(cssCode) {
  var styleElement = document.createElement('style');
    styleElement.type = 'text/css';
    if (styleElement.styleSheet) {
      styleElement.styleSheet.cssText = cssCode;
    } else {
      styleElement.appendChild(document.createTextNode(cssCode));
    }
    document.getElementsByTagName('head')[0].appendChild(styleElement);
}
  
function addCssFile(cssFile) {
  var styleElement = document.createElement('link');
  
  styleElement.type = 'text/css';
  styleElement.rel = 'stylesheet';
  styleElement.href = cssFile;
  document.getElementsByTagName('head')[0].appendChild(styleElement);
}
  
function getKeyCode(e)
{
	if (window.event)
		return window.event.keyCode;
	else if (e)
		return e.which;
	else
		return null;
}
  
function keyRestrict(e, validchars) {
	var key='', keychar='';
	key = getKeyCode(e);
	if (key == null) return true;
	keychar = String.fromCharCode(key);
	keychar = keychar.toLowerCase();
	validchars = validchars.toLowerCase();
	if (validchars.indexOf(keychar) != -1)
		return true;
	if ( key==null || key==0 || key==8 || key==9 || key==13 || key==27 )
		return true;
	return false;
}

function isValueInRange(value, minValue, maxValue) {
  if ((value < minValue) || (value > maxValue)) {
    alert('Value is not valid!');
    return false;
  } else {
    return true;
  }
}


function showElement(id) {
  var element = document.getElementById(id);
  element.style.display = '';
}

function hideElement(id) {
  var element = document.getElementById(id);
  element.style.display = 'none';
}

function toggleElement(id) {
  var element = document.getElementById(id);
  
  if (element.style.display == '') 
    hideElement(id);
  else
    showElement(id);
}