var currentFontSize = 4;



function revertStyles(fontsize){

	currentFontSize = fontsize;

	changeFontSize(0);

}



function changeFontSize(sizeDifference){

	//get css font size

	var rule = getRuleByName("body.fs" + (currentFontSize + sizeDifference));

	if (rule){

		document.body.style.fontSize = rule.style.fontSize;

		currentFontSize = currentFontSize + sizeDifference;

		createCookie("FontSize", currentFontSize, 365);

	}

	return;

	

};



function getRuleByName(ruleName){

	for (i=0; i<document.styleSheets.length; i++){

		var style = document.styleSheets[i];

		var rules = style.cssRules?style.cssRules:style.rules;

		if (rules){

			for (j = 0; j<rules.length; j++){

				if (rules[j].selectorText.trim().toUpperCase() == ruleName.trim().toUpperCase()){

					return rules[j];

				}

			}

		}

	}

	return null;

}



function setActiveStyleSheet(title) {



	createCookie("ColorCSS", title, 365);

	window.location.reload();

	return;



  var i, a, main, arr;

  arr = document.getElementsByTagName("link");

  for(i=0; (a = arr[i]); i++) {

  	var ltitle = a.getAttribute("title");

    if(a.getAttribute("rel").indexOf("style") != -1 && ltitle) {

      a.disabled = true;

      if(ltitle == title) a.disabled = false;

    }

  }

  createCookie("ColorCSS", title, 365);

}



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 expires = "";

  document.cookie = name+"="+value+expires+"; path=/";

}



function setScreenType(screentype){

	bclass = document.body.className.trim();

	if (bclass.indexOf(' ') > 0){

		bclass = bclass.replace(/^\w+/,screentype);

	}else{

		bclass = screentype + ' ' + bclass;

	}



	document.body.className = bclass;

	createCookie("ScreenType", screentype, 365);

}



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



function changeToolHilite(oldtool, newtool) {

	if (oldtool != newtool) {

		if (oldtool) {

			oldtool.src = oldtool.src.replace(/-hilite/,'');

		}

		newtool.src = newtool.src.replace(/.gif$/,'-hilite.gif');

	}

}