/**
   * toggle value for input fields on form
   */
   function toggleInput( html_element, toggle_text )
   {
       $(html_element).focus(function(){
         if(this.value.toLowerCase() != toggle_text.toLowerCase())
         { /*do nothing*/ }
         else{ this.value = ''; }
       });
       
       $(html_element).blur(function(){
         if(this.value == '') { this.value = toggle_text; }
       });
   }
   
  /**
   * adds javascript src to a page dynamically
   */
  function addJavascript(jsname,pos) 
  {
    var th = document.getElementsByTagName(pos)[0];
    var s = document.createElement('script');
    s.setAttribute('type','text/javascript');
    s.setAttribute('src',jsname);
    th.appendChild(s);
  }