// JavaScript Document

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

//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)
			if (isNaN(p_valSelected)){
				eval("document.getElementById('" + p_previousAns + "').style.display = 'none'");
			}else{
				eval("document.getElementById('layer" + p_previousAns + "').style.display = 'none'");
			}
		}
	}
	p_valSelected = layerName
	if (isNaN(p_valSelected)){
		if (viewState == "show"){	
			eval("document.getElementById('" + p_valSelected + "').style.display = ''");
		}else{
			eval("document.getElementById('" + p_valSelected + "').style.display = 'none'");
		}	
	}else{
		if (viewState == "show"){
			eval("document.getElementById('layer" + p_valSelected + "').style.display = ''");
		}else{
			eval("document.getElementById('layer" + p_valSelected + "').style.display = 'none'");
		}
	}
}

//function to open new window
function openWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}