var SIGNUP_CONTENT_WIDTH = 800;
  	 var SIGNUP_CONTENT_HEIGHT = 735;
     var signupLoadingImage = 'loading.gif';
     var signupBodyLayer    = null;
     var signupOverlayLayer = null;
     var signupLayer = null;
     var SIGNUP_BASE_PAGE = "/signup";
     var signupAjaxInstance = new AjaxObject();
 
     var signupOverlayTop = ( ( browser.getWindowHeight() - 35 - SIGNUP_CONTENT_HEIGHT ) / 2 );
     if ( signupOverlayTop < 0 ) {
     	signupOverlayTop = 20;
     }
     var signupOverlayLeft = ( ( browser.getWindowWidth() - 20 - SIGNUP_CONTENT_WIDTH ) / 2 );

     function initSignupOverlayLayers() {
        signupBodyLayer = document.getElementsByTagName( "body" ).item( 0 );
        //alert( signupBodyLayer.id );
        signupOverlayLayer = document.createElement( "div" );
        signupOverlayLayer.setAttribute( 'id', 'signupOverlayLayer' );
        signupOverlayLayer.onclick = function() { hideSignupOverlay(); };
        signupOverlayLayer.style.position = 'absolute';
        signupOverlayLayer.style.visibility = "hidden";
        signupOverlayLayer.style.height = ( browser.getPageHeight() + 'px');
        signupOverlayLayer.style.top = '-5px';
        signupOverlayLayer.style.left = '0px';
        signupOverlayLayer.style.zIndex = '100';
        signupOverlayLayer.style.width = '100%';

        signupBodyLayer.insertBefore( signupOverlayLayer, signupBodyLayer.firstChild );

        signupLayer = document.createElement( "div" );
        signupLayer.setAttribute( 'id', 'signupLayer' );
        signupLayer.style.position = 'absolute';
        signupLayer.style.visibility = "hidden";
        signupLayer.style.top = signupOverlayTop + 'px';
        signupLayer.style.left = signupOverlayLeft + 'px';
        signupLayer.style.zIndex = '200';
        signupLayer.style.width = SIGNUP_CONTENT_WIDTH + 'px';
        signupLayer.style.height = SIGNUP_CONTENT_HEIGHT + 'px';

        //signupOverlayLayer.appendChild( signupLayer );
        signupBodyLayer.insertBefore( signupLayer, signupBodyLayer.firstChild );
     }

     var initialParams = "";
			 
     function showSignupOverlay( initialParams ) {
        browser.hideSelects();
        initSignupOverlayLayers();
           
        signupAjaxInstance = null;
        signupAjaxInstance = new AjaxObject();
        signupAjaxInstance.intializeConnection();
        signupAjaxInstance.setUrl( SIGNUP_BASE_PAGE );
        signupAjaxInstance.setWriteToLayer( "signupLayer" );
        signupAjaxInstance.setUrlParams( initialParams );
        signupAjaxInstance.xmlhttpPost();
        
        browser.changeAttribute( "flash_player", "visibility", "hidden" );
        signupOverlayLayer.style.visibility = "visible";
        signupLayer.style.visibility = "visible";

        var runStr = "document.getElementById( 'referring_uri' ).value = document.location";
        setTimeout( runStr, 2000 );
     }

    function hideSignupOverlay() {
      browser.showSelects();

      signupOverlayLayer.style.visibility = "hidden";
      signupLayer.style.visibility = "hidden";
      browser.changeAttribute( "flash_player", "visibility", "visible" );
      
      signupOverlayLayer.flush();
    }
    
    function submitSignup( formRef ) {
	
           var formObj = new FormClass();
           formObj.setForm( formRef );
           formObj.init();
           signupAjaxInstance.setParams( formObj.getQueryString() );
           signupAjaxInstance.xmlhttpPost();
    }