var font_sizes = new Array(12, 15);
//var font_sizes = new Array(0.1, 0.2, 0.3);
var current_font_level = 0;
var decrease_font_level = 0;
var increase_font_level = 0;

/*function get_document(id) {
		if (navigator.appName.indexOf("Microsoft") != -1) {
			 return window[id];
		 } else {
			 return document[id];
		 }
	}
*/
function get_document( id )
{
	var object = null;
		
	if( document.layers ) {   
		object = document.layers[id];
	} else if( document.all ) {
		object = document.all[id];
	} else if( document.getElementById ) {
		object = document.getElementById(id);
	}
	return object;
}

function setFontSizeLevels()
{
	if (readCookie('font_size') == null) {
		increase_font_level = 1;
	}
	else {
		current_font_level = parseInt(readCookie('font_size'));
		increase_font_level = current_font_level + 1;
		decrease_font_level = current_font_level - 1;
	
		if (increase_font_level >= font_sizes.length)
			increase_font_level = font_sizes.length - 1;
		if (decrease_font_level < 0)
			decrease_font_level = 0;
	}
}

function loadFontSize ()
{
	if (readCookie('font_size') == null) {
		current_font_level = 0;
	} else {
		
		current_font_level = parseInt(readCookie('font_size'));
		//alert(current_font_level);
	}	
	setFontSizeA (current_font_level);
}

function setFontSizeA( size )
{
	
	//alert("a");
	if( size >= 0 && size < font_sizes.length )
	{
		current_font_level = size;
	}
	else if( ++current_font_level >= font_sizes.length )
	{
		current_font_level = 0;
	}
	
	document.write("<style>");
	document.write("body{font-size:"+font_sizes[ current_font_level ] + 'px'+"}");
	document.write("</style>");
	

}

function setFontSize( size )
{
	if( size >= 0 && size < font_sizes.length )
	{
		current_font_level = size;
	}
	else if( ++current_font_level >= font_sizes.length )
	{
		current_font_level = 0;
	}	
	
	if ( document.body )
	{	
		document.body.style.fontSize = font_sizes[ current_font_level ] + 'px';

		if(get_document("myFrame")){
			window.frames['myFrame'].document.getElementById('mainContent').style.fontSize = font_sizes[ current_font_level ] + 'px';
			//document.frames.myFrame.document.body.style.fontSize = font_sizes[ current_font_level ] + 'px';	
		}
		createCookie("font_size", current_font_level, "1");
		setFontSizeLevels();
	}
	else{
		//alert("Set Font Size");
	}
}

function createCookie(name,value,days)
{
	if (days)
	{
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name)
{
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++)
	{
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length); 
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name)
{
	createCookie(name,"",-1);
}

window.onload= function(){
	
	//loadFontSize();
	//alert("here");
}

loadFontSize();