//holdings.js

//Assign functions to mouseover events on chart
function initChart() {
	var i, tagName;
	var map = document.getElementById("holdingsMap");
	if(map) {
		var areaCollection = map.childNodes;
		for(i=0; i<areaCollection.length; i++) {
			addEvent(areaCollection.item(i), "mouseover", showHolder);
			addEvent(areaCollection.item(i), "mouseout", hideHolders);
		}
	}
}

//Function to display holdings details
function showHolder() {
	//Get source
	var e = arguments.length ? arguments[0] : window.event;
	var src = getSrcElement(e);
	 
	//Read custom attribute
	var holderType = src.getAttribute("holderType");

	//Reset visibility of DIVs to show appropriate information
	document.getElementById("portionInstitutions").style.display = (holderType == "institutions" ? "inline" : "none");
	document.getElementById("portionMutualFunds").style.display = (holderType == "mutualFunds" ? "inline" : "none");
	document.getElementById("portionOtherHolders").style.display = (holderType == "otherHolders" ? "inline" : "none");
}


//Function to hide holdings details
function hideHolders() {
	document.getElementById("portionInstitutions").style.display = "none";
	document.getElementById("portionMutualFunds").style.display = "none";
	document.getElementById("portionOtherHolders").style.display = "none";
}


addEvent(window, "load", initChart);