// This next little bit of code tests whether the user accepts cookies.
var WM_acceptsCookies = false;
if(document.cookie == '') {
    document.cookie = 'WM_acceptsCookies=yes'; // Try to set a cookie.
    if(document.cookie.indexOf('WM_acceptsCookies=yes') != -1) {
	WM_acceptsCookies = true; 
    }// If it succeeds, set variable
} else { // there was already a cookie
  WM_acceptsCookies = true;
}


function WM_setCookie (name, value, hours, path, domain, secure) {
    if (WM_acceptsCookies) { // Don't waste your time if the browser doesn't accept cookies.
	var not_NN2 = (navigator && navigator.appName 
		       && (navigator.appName == 'Netscape') 
		       && navigator.appVersion 
		       && (parseInt(navigator.appVersion) == 2))?false:true;

	if(hours && not_NN2) { // NN2 cannot handle Dates, so skip this part
	    if ( (typeof(hours) == 'string') && Date.parse(hours) ) { // already a Date string
		var numHours = hours;
	    } else if (typeof(hours) == 'number') { // calculate Date from number of hours
		var numHours = (new Date((new Date()).getTime() + hours*3600000)).toGMTString();
	    }
	}
	document.cookie = name + '=' + escape(value) + ((numHours)?(';expires=' + numHours):'') + ((path)?';path=' + path:'') + ((domain)?';domain=' + domain:'') + ((secure && (secure == true))?'; secure':''); // Set the cookie, adding any parameters that were specified.
    }
} // WM_setCookie


function WM_readCookie(name) {
    if(document.cookie == '') { // there's no cookie, so go no further
	return false; 
    } else { // there is a cookie
	var firstChar, lastChar;
	var theBigCookie = document.cookie;
	firstChar = theBigCookie.indexOf(name);	// find the start of 'name'
	var NN2Hack = firstChar + name.length;
	if((firstChar != -1) && (theBigCookie.charAt(NN2Hack) == '=')) { // if you found the cookie
	    firstChar += name.length + 1; // skip 'name' and '='
	    lastChar = theBigCookie.indexOf(';', firstChar); // Find the end of the value string (i.e. the next ';').
	    if(lastChar == -1) lastChar = theBigCookie.length;
	    return unescape(theBigCookie.substring(firstChar, lastChar));
	} else { // If there was no cookie of that name, return false.
	    return false;
	}
    }	
} // WM_readCookie

function WM_killCookie(name, path, domain) {
  var theValue = WM_readCookie(name); // We need the value to kill the cookie
  if(theValue) {
      document.cookie = name + '=' + theValue + '; expires=Fri, 13-Apr-1970 00:00:00 GMT' + ((path)?';path=' + path:'') + ((domain)?';domain=' + domain:''); // set an already-expired cookie
  }
} // WM_killCookie


ns4 = document.layers; 
if (!ns4) { 
	
if (WM_readCookie('siteStyle')!="") { 
    changeStyles('='); 
} 
else { 
	WM_setCookie('siteStyle','default',17520,'/');
    changeStyles('='); 
	
} 
} 

function changeStyles (myfunc) { 

	ns4 = document.layers; 
	var newStyle = "";
   	if (ns4) { 
   		alert ("Sorry, NS4 does not let us to change styles."); 
    	return false; 
    } 
   	else {
	   	
	   	currentStyle=WM_readCookie('siteStyle');
	   //	alert(currentStyle)
		if(myfunc=='+' && currentStyle=='default')
		{
			newStyle = 'accessible'
		}
		if(myfunc=='+' && currentStyle=='accessible')
		{
			newStyle = 'accessible2'
		}
		if(myfunc=='+' && currentStyle=='accessible2')
		{
			newStyle = 'accessible2'
		}
		if(myfunc=='-' && currentStyle=='accessible')
		{
			newStyle = 'default'
		}
		if(myfunc=='-' && currentStyle=='accessible2')
		{
			newStyle = 'accessible'
		}
		if(myfunc=='-' && currentStyle=='default')
		{
			newStyle = 'default'
		}
		if(myfunc=='=')
		{
			newStyle = WM_readCookie('siteStyle');
		}
		   
		// alert("myfunc:" + myfunc + "  mystyle:" + newStyle + "  Current: " + currentStyle);
		
		if(newStyle=='default')
		{
			defaultSheet = document.getElementById('ctl00_accessible'); 
       		defaultSheet.disabled = true; 
       		defaultSheet2 = document.getElementById('ctl00_accessible2'); 
       		defaultSheet2.disabled = true; 
    
        	newSheet = document.getElementById('ctl00_default'); 
        	newSheet.disabled = false; 
    	}
    	if(newStyle=='accessible')
		{
			defaultSheet = document.getElementById('ctl00_default'); 
       		defaultSheet.disabled = true; 
       		defaultSheet2 = document.getElementById('ctl00_accessible2'); 
       		defaultSheet2.disabled = true; 
    
        	newSheet = document.getElementById('ctl00_accessible'); 
        	newSheet.disabled = false; 
    	}
    	if(newStyle=='accessible2')
		{
			defaultSheet = document.getElementById('ctl00_accessible'); 
       		defaultSheet.disabled = true; 
       		defaultSheet2 = document.getElementById('ctl00_default'); 
       		defaultSheet2.disabled = true; 
    
        	newSheet = document.getElementById('ctl00_accessible2'); 
        	newSheet.disabled = false; 
    	}

        WM_setCookie('siteStyle',newStyle,17520,'/');
	 }
return true; 

}