function depthCharge() {
	if (document.getElementById) {
		var depthChargeA = document.getElementById("depthChargeA").offsetTop;
		var depthChargeB = document.getElementById("depthChargeB").offsetTop;
	
		if (depthChargeA > depthChargeB) {
			var depthCharge = (depthChargeA + 1) + "px";
		} else {
			var depthCharge = (depthChargeB + 1) + "px";
		}
	
		document.getElementById("wrapperA").style.height = depthCharge;
		document.getElementById("wrapperB").style.height = depthCharge;
		document.getElementById("wrapperC").style.height = depthCharge;
		document.getElementById("wrapperD").style.height = depthCharge;
	}
}

function dropDown(dropdownId) {
	if (document.getElementById) {
		document.getElementById(dropdownId).style.visibility = "visible";
		
	}
}

function dropDownClose(dropdownId) {
	if (document.getElementById) {
		document.getElementById(dropdownId).style.visibility = "hidden";
		
	}
}