//create a global variable for the showHideLayers function
var p_valSelected = 'ContributionDiv';

//function used to display and hide layers.
function showHideLayers(layerName,viewState,multiOpen){
	//Parameters passed:
	//layerName - name of layer to be turned on/off
	//viewState - should be set to show or hide
	//multiOpen- true/false; set to true if you want to open multiple layers. set to false if you want one layer open at a time
		
	
	//Check to see if user had checked an option before, if so hide current layer.	
	p_previousAns = p_valSelected;
	
	if (multiOpen == false)	{
		if (p_previousAns != "" && p_previousAns != "nextBtns"){
			//alert(p_previousAns)
			eval("document.getElementById('" + p_previousAns + "').style.display = 'none'");
		}
	}
	p_valSelected = layerName
	if (p_valSelected != ""){
		if (viewState == "show"){	
			eval("document.getElementById('" + p_valSelected + "').style.display = ''");
		}else{
			eval("document.getElementById('" + p_valSelected + "').style.display = 'none'");
		}	
	}

	//function to swapp out the classes
		function changeClass(tempLayer,tempName){
			document.getElementById(tempLayer).setAttribute((document.all ? "className" : "class"), tempName);
			return true;	
		}
}