/**
 * Add a function to the window.onload event
 */
function addLoadEvent(func){
  var oldonload = window.onload;
  if (typeof window.onload != 'function'){
    window.onload = func;
  } else {
    window.onload = function(){
      oldonload();
      func();
    }
  }
}

/*http://www.webreference.com/js/column8/functions.html
   name - name of the cookie
   value - value of the cookie
   [expires] - expiration date of the cookie
     (defaults to end of current session)
   [path] - path for which the cookie is valid
     (defaults to path of calling document)
   [domain] - domain for which the cookie is valid
     (defaults to domain of calling document)
   [secure] - Boolean value indicating if the cookie transmission requires
     a secure transmission
   * an argument defaults when it is assigned null as a placeholder
   * a null placeholder is not required for trailing omitted arguments
*/
function setCookie(name, value, expires, path, domain, secure) {
  var curCookie = name + "=" + escape(value) +
      ((expires) ? "; expires=" + expires.toGMTString() : "") +
      ((path) ? "; path=" + path : "") +
      ((domain) ? "; domain=" + domain : "") +
      ((secure) ? "; secure" : "");
  document.cookie = curCookie;
}

/*
  name - name of the desired cookie
  return string containing value of specified cookie or null
  if cookie does not exist
*/
function getCookie(name) {
  var dc = document.cookie;
  var prefix = name + "=";
  var begin = dc.indexOf("; " + prefix);
  if (begin == -1) {
    begin = dc.indexOf(prefix);
    if (begin != 0) return null;
  } else
    begin += 2;
  var end = document.cookie.indexOf(";", begin);
  if (end == -1)
    end = dc.length;
  return unescape(dc.substring(begin + prefix.length, end));
}

/*
   name - name of the cookie
   [path] - path of the cookie (must be same as path used to create cookie)
   [domain] - domain of the cookie (must be same as domain used to
     create cookie)
   path and domain default if assigned null or omitted if no explicit
     argument proceeds
*/
function deleteCookie(name, path, domain) {
  if (getCookie(name)) {
    document.cookie = name + "=" +
    ((path) ? "; path=" + path : "") +
    ((domain) ? "; domain=" + domain : "") +
    "; expires=Thu, 01-Jan-70 00:00:01 GMT";
  }
}

function getWindowWidth()
{
    if (window.innerWidth) {
        return window.innerWidth - 18;
    } else if (document.documentElement && document.documentElement.clientWidth) {
        return document.documentElement.clientWidth;
    } else if (document.body && document.body.clientWidth) {
        return document.body.clientWidth;
    }
    return 0;
}

/** Post form to a popup window */
function submitFormToWindow(formName,name,width,height){
    var top = 100;
    var left = (getWindowWidth() / 2) - (width/2) + 'px';
    var options = "width="+width+",height="+height+",status=yes,toolbar=no,"
        +"directories=no,menubar=no,location=no,resizable=yes,scrollbars=yes,"
        +"left="+left+",top="+top;
    var hwnd = open("", name, options);
    var a = window.setTimeout("document."+formName+".submit();", 500);
}

/** Get Y scroll */
function getScrollY() {
    if( typeof( window.pageYOffset ) == 'number' ) {
        //Netscape compliant
        return window.pageYOffset;
    } else if(document.body && document.body.scrollTop) {
        //DOM compliant
        return document.body.scrollTop;
    } else if(document.documentElement && document.documentElement.scrollTop) {
        //IE6 standards compliant mode
        return document.documentElement.scrollTop;
    }
    return 0;
}