function contentOff() {
		var busyLayer = document.getElementById("busy_layer_gray");

	if (window.innerHeight && window.scrollMaxY) {
		yScroll = window.innerHeight + window.scrollMaxY;
		var deff = document.documentElement;
		var hff = (deff&&deff.clientHeight) || document.body.clientHeight || window.innerHeight || self.innerHeight;
		yScroll -= (window.innerHeight - hff);
	} else if (document.body.scrollHeight > document.body.offsetHeight || document.body.scrollWidth > document.body.offsetWidth){
		yScroll = document.body.scrollHeight;
	} else {
		yScroll = document.body.offsetHeight;
  	}

	if (busyLayer != null) {
		busyLayer.style.visibility = "visible";
		busyLayer.style.height = yScroll;
	}
};

function contentOn() {
		var busyLayer = document.getElementById("busy_layer_gray");
		if (busyLayer != null) {
			busyLayer.style.visibility = "hidden";
			busyLayer.style.height = "0px";
		}
};