function loadjscssfile(filename){

  var fileref=document.getElementById("cssLinkBlackOrWhite")
  fileref.setAttribute("href", filename)
 
 if (typeof fileref!="undefined")
  document.getElementsByTagName("head")[0].appendChild(fileref)
}

function setCookie(sName, sValue) {
    var today = new Date(), expires = new Date();
    expires.setTime(today.getTime() + (365*24*60*60*1000));
    document.cookie = sName + "=" + sValue + ";expires=" + expires.toGMTString();
}

window.onload = function (){
	
	document.getElementById("cssSelector").style.display = "block";
	document.getElementById("selectBlackCss").onclick = function (){
		loadjscssfile("/css/black.css");
		setCookie("cssColor","black");
	}
	document.getElementById("selectWhiteCss").onclick = function (){
		loadjscssfile("/css/white.css");
		setCookie("cssColor","white");
	}
};