var popupStatus = 0;
var popupId = "";

$(document).ready(function(){
	$("#popupContactClose").click(function(){  
		disablePopup();  
	});  
	  
	$("#backgroundPopup").click(function(){  
		disablePopup();  
	});  
	  
	$(document).keypress(function(e){  
		if(e.keyCode==27 && popupStatus==1){  
			disablePopup();  
		}  
	});
});

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

function disablePopup(){  
	//disables popup only if it is enabled  
	if(popupStatus==1){  
		$("#backgroundPopup").fadeOut("slow");  
		$("#"+popupId).fadeOut("slow");  
		popupStatus = 0;  
	}  
}

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