function setCookie(name,value,days,path,domain,secure) {
  var expires, date;
  if (typeof days == "number") {
    date = new Date();
    date.setTime( date.getTime() + (days*24*60*60*1000) );
		expires = date.toGMTString();
  }
  document.cookie = name + "=" + escape(value) +
    ((expires) ? "; expires=" + expires : "") +
    ((path) ? "; path=" + path : "") +
    ((domain) ? "; domain=" + domain : "") +
    ((secure) ? "; secure" : "");
}

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

function deleteCookie(name,path,domain) {
  if (getCookie(name)) {
    document.cookie = name + "=" +
      ((path) ? "; path=" + path : "") +
      ((domain) ? "; domain=" + domain : "") +
      "; expires=Thu, 01-Jan-70 00:00:01 GMT";
  }
}

var font_Sizer = {
    sizeUnit:       "px",
    defaultSize:    10,
    maxSize:        36,
    minSize:        10,
    queryName:      "dw_fsz",   // name to check query string for when passing size in URL
    queryNum:       true,       // check query string for number only (eg. index.html?18 )
    adjustList:[],
    setDefaults:function(unit,dflt,mn,mx,sels){
	this.sizeUnit=unit;
	this.defaultSize=dflt;
	this.maxSize=mx;
	this.minSize=mn;
	if(sels)this.set(dflt,mn,mx,sels);
	},
    set:function(dflt,mn,mx,sels){
	var ln=this.adjustList.length;
	for(var i=0; sels[i]; i++){
		this.adjustList[ln+i]=[];
		this.adjustList[ln+i]["sel"]=sels[i];
		this.adjustList[ln+i]["dflt"]=dflt;
		this.adjustList[ln+i]["min"]=mn||this.minSize;
		this.adjustList[ln+i]["max"]=mx||this.maxSize;
		this.adjustList[ln+i]["ratio"]=this.adjustList[ln+i]["dflt"]/this.defaultSize;
		}
	},
    init:function(){
	if(!document.getElementById||!document.getElementsByTagName)return;
	var size,sizerEl,i;
	size=getValueFromQueryString(this.queryName,this.queryNum);
	if(isNaN(parseFloat(size))||size>this.maxSize||size<this.minSize){
		size=getCookie("fontSize");
		if(isNaN(parseFloat(size))||size>this.maxSize||size<this.minSize){
			size=this.defaultSize;
		}
	}
	this.curSize=this.defaultSize;
	sizerEl=document.getElementById('sizer');
	if(sizerEl)sizerEl.style.display="block";
	if(this.adjustList.length==0){
		this.setDefaults(this.sizeUnit,this.defaultSize,this.minSize,this.maxSize,['body','th','td','font','span','a']);
	}
	if(size!=this.defaultSize)this.adjust(size-this.defaultSize);
	this.curWeight=0;
	if(getCookie("fontWeight")==1)this.bold();
	},
    adjust:function(n){
	if(!this.curSize)return;
	var alist,size,list,i,j;
	if(n>0){
		if(this.curSize+n>this.maxSize)n=this.maxSize-this.curSize;
	} else if(n<0){
		if(this.curSize+n<this.minSize)n=this.minSize-this.curSize;
	}
	if(n==0)return;
	this.curSize+=n;
	alist=this.adjustList;
	for(i=0; alist[i]; i++){
		size=this.curSize*alist[i]['ratio'];
		size=Math.max(alist[i]['min'],size);
		size=Math.min(alist[i]['max'],size);
		list=dw_getElementsBySelector(alist[i]['sel']);
		for(j=0; list[j]; j++){
			list[j].style.fontSize=size+this.sizeUnit;
		}
	}
	setCookie("fontSize",this.curSize,180,"/");
	},
    reset:function(){
	if(!this.curSize)return;
	var alist=this.adjustList,list,i,j;
	for(i=0; alist[i]; i++){
		list=dw_getElementsBySelector(alist[i]['sel']);
		for(j=0; list[j]; j++){
			list[j].style.fontSize='';
			if (list[j].style.fontWeight=="bold") list[j].style.fontWeight="normal";
		}
	}
	this.curSize=this.defaultSize;
	deleteCookie("fontSize","/");
	this.curWeight=0;
	setCookie("fontWeight",this.curWeight,180,"/");
	},
    bold:function(){
	alist=this.adjustList;
	for(i=0; alist[i]; i++){
		list=dw_getElementsBySelector(alist[i]['sel']);
		for(j=0; list[j]; j++){
			if (list[j].style.fontWeight=="") list[j].style.fontWeight="normal";
			if (list[j].style.fontWeight=="normal") list[j].style.fontWeight="bold";
			else if (list[j].style.fontWeight=="bold") list[j].style.fontWeight="normal";
		}
	}
	if(this.curWeight==0) this.curWeight++; else this.curWeight=0;
	setCookie("fontWeight",this.curWeight,180,"/");
	}
};

function dw_getElementsBySelector(selector){
	if(!document.getElementsByTagName)return[];
	var nodeList=[document],tokens,bits,list,col,els,i,j,k;
	selector=selector.normalize();
	tokens=selector.split(' ');
	for(i=0; tokens[i]; i++){
		if(tokens[i].indexOf('#')!=-1){
			bits=tokens[i].split('#');
			var el=document.getElementById(bits[1]);
			if(!el)return[];
			if(bits[0]){
				if(el.tagName.toLowerCase()!=bits[0].toLowerCase())return[];
			}
			for(j=0; nodeList[j]; j++){
				if(nodeList[j]==document||dw_contained(el,nodeList[j]))nodeList=[el];
			else return[];
			}
		} else if(tokens[i].indexOf('.')!=-1){
			bits=tokens[i].split('.');
			col=[];
			for(j=0; nodeList[j]; j++){
				els=dw_getElementsByClassName(bits[1],bits[0],nodeList[j]);
				for(k=0; els[k]; k++){
					col[col.length]=els[k];
				}
			}
			nodeList=[];
			for(j=0; col[j]; j++){
				nodeList.push(col[j]);
			}
		} else{
			els=[];
			for(j=0; nodeList[j]; j++){
				list=nodeList[j].getElementsByTagName(tokens[i]);
				for(k=0; list[k]; k++){
					els.push(list[k]);
				}
			}
			nodeList=els;
		}
	}
	return nodeList;
};

function dw_getElementsByClassName(sClass,sTag,oCont){
	var result=[],list,i;
	var re=new RegExp("\\b"+sClass+"\\b","i");
	oCont=oCont?oCont:document;
	if(document.getElementsByTagName){
		if(!sTag||sTag=="*"){
			list=oCont.all?oCont.all:oCont.getElementsByTagName("*");
		} else{
			list=oCont.getElementsByTagName(sTag);
		}
		for(i=0; list[i]; i++)if(re.test(list[i].className))result.push(list[i]);
	}
	return result;
};

function getValueFromQueryString(varName,bReturn){
	var val="";
	if(window.location.search){
		var qStr=window.location.search.slice(1);
		var ar=qStr.split("&");
		var get=[],ar2;
		for(var i=0; ar[i]; i++){
			if(ar[i].indexOf("=")!=-1){
				ar2=ar[i].split("=");
				get[ar2[0]]=ar2[1];
			}
		}
		val=get[varName];
		if(!val&&bReturn){
			val=qStr;
		}
	}
	return val;
};

function dw_contained(oNode,oCont){
	if(!oNode)return;
	while(oNode=oNode.parentNode)if(oNode==oCont)return true;
	return false;
};

if(!Array.prototype.push){
	Array.prototype.push=function(){
		for(var i=0; arguments[i]; i++)this[this.length]=arguments[i];
		return this[this.length-1];
	}
};

String.prototype.normalize=function(){
	var re=/\s\s+/g;
	return this.trim().replace(re," ");
};

String.prototype.trim=function(){
	var re=/^\s+|\s+$/g;
	return this.replace(re,"");
};

font_Sizer.init();