//close popup on click to close button
$('#popupContactClose').live('click', function(){
    disablePopup();
});

//close popup on click outside popup
$('#backgroundPopup').live('click', function(){  
    disablePopup();  
});  

//0 means disabled; 1 means enabled;  
var popupStatus = 0;  

function loadPopup(){  
//loads popup only if it is disabled  
    if(popupStatus==0){  
        $('#backgroundPopup').css({  
            'opacity': '0.7'  
        });  
        $('#backgroundPopup').fadeIn('slow');  
        $('#popupContact').fadeIn('slow');  
        popupStatus = 1;  
    }  
}

//disabling popup with jQuery magic!  
function disablePopup(){  
    //disables popup only if it is enabled  
    if(popupStatus==1){  
        $('#backgroundPopup').fadeOut('slow');  
        $('#popupContact').fadeOut('slow');  
        popupStatus = 0;  
    }  
}  

//centering popup  
function centerPopup(){  
    //request data for centering  
    var windowWidth = document.documentElement.clientWidth;  
    var windowHeight = document.documentElement.clientHeight;  
    var popupHeight = $('#popupContact').height();  
    var popupWidth = $('#popupContact').width();  
    //centering  
    $('#popupContact').css({  
        'position': 'absolute',  
        'top': windowHeight/2-popupHeight/2 + 100,  
        'left': windowWidth/2-popupWidth/2  
    });  
    //only need force for IE6  
      
    $('#backgroundPopup').css({  
        'height': windowHeight  
    });  
      
}