var defFontSize		= 12;
var defFontChange	= 2;
var defFontState	= 1;
var minFontState	= 1;
var maxFontState	= 5;


function changeFontsize(fState){
	var changeIt=false;
	var cookieState=parseInt(readCookie("osmhiFS"));
	var fontState=((cookieState>=minFontState)&&(cookieState<=maxFontState))?cookieState:defFontState;
	//alert('startstate='+fontState);
	
	if (fState == 'inc'){
		if (fontState<maxFontState){
			fontState=fontState+1;
			changeIt=true;
		}
	}
	else if (fState == 'desc'){
		if (fontState>minFontState){
			fontState=fontState-1;
			changeIt=true;
		}
	}
	else if (fState == 'def'){
		fontState=defFontState;
		changeIt=true;
	}
	else if(fontState==defFontState){
		eraseCookie("osmhiFS");
	}
	else{
		changeIt=true;
	}
	
	if (changeIt){
		createCookie("osmhiFS",fontState,2);
		
		fSize = defFontSize+((fontState-defFontState)*defFontChange);
		//alert(fSize+'='+defFontSize+'+(('+fontState+'-'+defFontState+')*'+defFontChange+')');
		document.getElementById("content").style.fontSize = fSize+"px";
		
		element=document.getElementById("content");
		getElement = element.getElementsByTagName("p");
		for (i=0; i<getElement.length; i++){
			getElement[i].style.fontSize=(fSize)+"px";
		}
		
		getElement = element.getElementsByTagName("tr");
		for (i=0; i<getElement.length; i++){
			getElement[i].style.fontSize=(fSize)+"px";
		}
		
		getElement = element.getElementsByTagName("td");
		for (i=0; i<getElement.length; i++){
			getElement[i].style.fontSize=(fSize)+"px";
		}
		
		getElement = element.getElementsByTagName("h1");
		for (i=0; i<getElement.length; i++){
			getElement[i].style.fontSize=(fSize+2)+"px";
		}
		
		getElement = element.getElementsByTagName("h2");
		for (i=0; i<getElement.length; i++){
			getElement[i].style.fontSize=(fSize+1)+"px";
		}
	}
}

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);
}