// JavaScript Document
var student = false;
var regulatory = false;

function switchDiv2(div_id)
{
	var style_sheet = getStyleObject(div_id);
	if (style_sheet)
	{
		if (div_id == "stu_yes" || div_id == "stu_no") {
			hideAll_stu();
		}
		else if (div_id == "reg_yes" || div_id == "reg_no") {
			hideAll_reg();
		}
		// Switch "on"
		changeObjectVisibility(div_id,"visible");
	}
	else 
	{
		alert("Sorry, this only works in browsers that do Dynamic HTML");
	}
}


// function hideAll()
//  hides a bunch of divs
//
function hideAll_stu() {
	changeObjectVisibility("stu_yes","hidden");
	changeObjectVisibility("stu_no","hidden");
}

function hideAll_reg() {
	changeObjectVisibility("reg_yes","hidden");
	changeObjectVisibility("reg_no","hidden");
}
// function getStyleObject(string) -> returns style object
//  given a string containing the id of an object
//  the function returns the stylesheet of that object
//  or false if it can't find a stylesheet.  Handles
//  cross-browser compatibility issues.
//
function getStyleObject(objectId) {
  // checkW3C DOM, then MSIE 4, then NN 4.
  //
	if(document.getElementById && document.getElementById(objectId)) {
		return document.getElementById(objectId).style;
	}
	else if (document.all && document.all(objectId)) {  
		return document.all(objectId).style;
	}
	else if (document.layers && document.layers[objectId]) { 
		return document.layers[objectId];
	}
	else {
		return false;
	}
}

function changeObjectVisibility(objectId, newVisibility) {
    // first get a reference to the cross-browser style object 
    // and make sure the object exists
	var styleObject = getStyleObject(objectId);
	
	if(styleObject) {
		styleObject.visibility = newVisibility;
		return true;
	}
	else {
	// we couldn't find the object, so we can't change its visibility
		return false;
    }
}