function SH_Block(sBlockID, iPos) {
	var oBl, oBlInd
	for (var i = 1; i < 6; i++) {
		oBl = document.getElementById("bl" + i + "_" + sBlockID);
		if (oBl) {
			if (i != iPos) {
				oBl.style.display = "none";
				oBlInd = document.getElementById("ind_bl" + i + "_" + sBlockID);
				if (oBlInd) { oBlInd.src = "/img/plus.gif"; }
			} else {
				oBlInd = document.getElementById("ind_bl" + i + "_" + sBlockID);
				if (oBl.style.display == "none") {
					oBl.style.display = "block";
					if (oBlInd) { oBlInd.src = "/img/minus.gif"; }
				} else {
					oBl.style.display = "none";
					if (oBlInd) { oBlInd.src = "/img/plus.gif"; }
				}
			}
		}
	}
	return false;
}