function showhide(id){
	if (document.getElementById){
		obj = document.getElementById(id);
		if (obj.style.display == "none"){
			obj.style.display = "";
			} else {
			obj.style.display = "none";
		}
	}
}
function map(id, tocheck){
	maphighlight("map_" + id);
	if (tocheck){
		checkuncheck(tocheck, "noobj");
		} else {
		checkuncheck("checkbox_" + id);
	}
}
function maphighlight(id){
	if (document.getElementById){
		obj = document.getElementById(id);
		if (obj.style.display == "none"){
			obj.style.display = "";
			} else {
			obj.style.display = "none";
		}
	}
}
function checkuncheck(id, noobj){
	if (document.getElementById){
		if (noobj) {
		obj = noobj;
		} else {
		obj = document.getElementById(id);		
		}
		if (obj.checked == false){
			obj.checked = true;
			} else {
			obj.checked = false;
		}
	}
}
function checkUncheckAll(theElement) {
	var theForm = theElement.form, z = 0;
		for(z=0; z<theForm.length;z++){
		if(theForm[z].type == 'checkbox' && theForm[z].name != 'checkall'){
			theForm[z].checked = theElement.checked;
			document.getElementById("map_bucks").style.display = "";
			document.getElementById("map_montgomery").style.display = "";
			document.getElementById("map_chester").style.display = "";
			document.getElementById("map_philadelphia").style.display = "";
			document.getElementById("map_delaware").style.display = "";
		}
	}
}