function OpenCall()
{
    document.getElementById('light').style.display='block';
    document.getElementById('fade').style.display='block';
    
    var Xwidth = document.getElementById('light').offsetWidth;
    var Xheight = document.getElementById('light').offsetHeight;
    
    ShowDeadCenterDiv(Xwidth, Xheight, 'light');
}

function OpenCallCenter()
{
    alert('nadav');
    document.getElementById('light').style.display='block';
    document.getElementById('fade').style.display='block';
    
    var Xwidth = document.getElementById('light').offsetWidth;
    var Xheight = document.getElementById('light').offsetHeight;
    
    ShowDeadCenterDiv(500, 370, 'light');
}

function ShowDeadCenterDiv(Xwidth,Yheight,divid) 
{ 
    // First, determine how much the visitor has scrolled 
    var scrolledX, scrolledY; 

    if( self.pageYOffset ) 
    { 

    scrolledX = self.pageXOffset; 
    scrolledY = self.pageYOffset; 
    } 
    else if( document.documentElement && document.documentElement.scrollTop ) 
    { 
        scrolledX = document.documentElement.scrollLeft; 
        scrolledY = document.documentElement.scrollTop; 
    } 
    else if( document.body ) 
    { 
        scrolledX = document.body.scrollLeft; 
        scrolledY = document.body.scrollTop; 
    } 

    // Next, determine the coordinates of the center of browser's window 
    var centerX, centerY; 

    if( self.innerHeight ) 
    { 
        centerX = self.innerWidth; 
        centerY = self.innerHeight; 
    } 
    else if( document.documentElement && document.documentElement.clientHeight ) 
    { 
        centerX = document.documentElement.clientWidth; 
        centerY = document.documentElement.clientHeight; 
    } 
    else if( document.body ) 
    { 
        centerX = document.body.clientWidth; 
        centerY = document.body.clientHeight; 
    } 
    // Xwidth is the width of the div, Yheight is the height of the 
    // div passed as arguments to the function: 
    var leftOffset = scrolledX + (centerX - Xwidth) / 2; 
    var topOffset = scrolledY + (centerY - Yheight) / 2; 

    // The initial width and height of the div can be set in the 
    // style sheet with display:none; divid is passed as an argument to // the function 
    var o=document.getElementById(divid); 
    var r=o.style; 
    r.position='absolute'; 
    r.top = topOffset + 'px'; 
    r.left = leftOffset + 'px'; 
    r.display = "block"; 
} 

function CloseJoinCall() 
{
    document.getElementById('light').style.display='none';
    document.getElementById('fade').style.display='none';
}