1 /**

     2  * Darkens the browser screen. This will make the entire page un-clickable except for any floating divs created after this is called. Restore with enlighten().

     3  * @param bool Controls whether the fade should be disabled or not. aclDisableTransitionFX will override this if set to true, and fades are never fired on IE.

     4  * @param int When specified, represents the numeric opacity value to set the fade layer to. 1-100.

     5  */

     6 

     7 var darkener_index = 0;

     8 

     9 function darken(nofade, opacVal)

    10 {

    11   if(IE)

    12     nofade = true;

    13   if ( !opacVal )

    14     opacVal = 70;

    15   darkener_index++;

    16   if(document.getElementById('specialLayer_darkener'))

    17   {

    18     if(nofade)

    19     {

    20       changeOpac(opacVal, 'specialLayer_darkener');

    21       document.getElementById('specialLayer_darkener').style.display = 'block';

    22       document.getElementById('specialLayer_darkener').myOpacVal = opacVal;

    23     }

    24     else

    25     {

    26       if ( document.getElementById('specialLayer_darkener').style.display != 'none' )

    27       {

    28         var currentOpac = document.getElementById('specialLayer_darkener').myOpacVal;

    29         opacity('specialLayer_darkener', currentOpac, opacVal, 1000);

    30         document.getElementById('specialLayer_darkener').myOpacVal = opacVal;

    31       }

    32       else

    33       {

    34         document.getElementById('specialLayer_darkener').style.display = 'block';

    35         document.getElementById('specialLayer_darkener').myOpacVal = opacVal;

    36         opacity('specialLayer_darkener', 0, opacVal, 1000);

    37       }

    38     }

    39   } else {

    40     w = getWidth();

    41     h = getHeight();

    42     var thediv = document.createElement('div');

    43     if(IE)

    44       thediv.style.position = 'absolute';

    45     else

    46       thediv.style.position = 'fixed';

    47     if ( IE )

    48     {

    49       var top = getScrollOffset();

    50       thediv.style.top = String(top) + 'px';

    51     }

    52     else

    53     {

    54       thediv.style.top = '0px';

    55     }

    56     thediv.style.left = '0px';

    57     thediv.style.opacity = '0';

    58     thediv.style.filter = 'alpha(opacity=0)';

    59     thediv.style.backgroundColor = '#000000';

    60     thediv.style.width =  '100%';

    61     thediv.style.height = '100%';

    62     thediv.zIndex = getHighestZ() + 5;

    63     thediv.id = 'specialLayer_darkener';

    64     thediv.myOpacVal = opacVal;

    65     if(nofade)

    66     {

    67       thediv.style.opacity = ( parseFloat(opacVal) / 100 );

    68       thediv.style.filter = 'alpha(opacity=' + opacVal + ')';

    69       body = document.getElementsByTagName('body');

    70       body = body[0];

    71       body.appendChild(thediv);

    72     } else {

    73       body = document.getElementsByTagName('body');

    74       body = body[0];

    75       body.appendChild(thediv);

    76       opacity('specialLayer_darkener', 0, opacVal, 1000);

    77     }

    78   }

    79 }

    80 

    81 /**

    82  * Un-darkens the screen and re-enables clicking of on-screen controls.

    83  * @param bool If true, disables the fade effect. Fades are always disabled if aclDisableTransitionFX is true and on IE.

    84  */

    85 

    86 function enlighten(nofade)

    87 {

    88   if(IE)

    89     nofade = true;

    90   darkener_index -= 1;

    91   if ( darkener_index > 0 )

    92     return false;

    93   if(document.getElementById('specialLayer_darkener'))

    94   {

    95     if(nofade)

    96     {

    97       document.getElementById('specialLayer_darkener').style.display = 'none';

    98     }

    99     else

   100     {

   101       var from = document.getElementById('specialLayer_darkener').myOpacVal;

   102       // console.info('Fading from ' + from);

   103       opacity('specialLayer_darkener', from, 0, 1000);

   104       setTimeout("document.getElementById('specialLayer_darkener').style.display = 'none';", 1000);

   105     }

   106   }

   107 }