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;  
		}  
	}  
	
	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,  
		"left": windowWidth/2-popupWidth/2  
		});  
		//only need force for IE6  
  			$("#backgroundPopup").css({  
		"height": windowHeight  
		});  
	}