function createRequest(){
	var xmlHttp = false;
	// Mozilla, Opera, Safari sowie Internet Explorer 7
	if (typeof XMLHttpRequest != 'undefined') {
	    xmlHttp = new XMLHttpRequest();
	}
	if (!xmlHttp) {
	    // Internet Explorer 6 und älter
	    try {
	        xmlHttp  = new ActiveXObject("Msxml2.XMLHTTP");
	    } catch(e) {
	        try {
	            xmlHttp  = new ActiveXObject("Microsoft.XMLHTTP");
	        } catch(e) {
	            xmlHttp  = false;
	        }
	    }
	}
	return xmlHttp;
}

function postcss(message, sessionID) {
 var client = createRequest();
 client.open("GET", "/changecss.jsp;jsessionid="+sessionID+"?"+message);
 client.send("");
}

function changecss(css, sessionID){
	if (document.styleSheets){
		var sheets = document.styleSheets;
		//alert("gewünscht: "+ css + ".css\naktuell: "+ sheets[0].href);
		var csslink=document.getElementById("css-link1");
		var aA1=document.getElementById("aA1");
		var aA2=document.getElementById("aA2");
		// Obacht: "1" ist: antolin.logik.Base.DEFAULT_PREFERRED_CSS
		if (css=="1"){
			csslink.href="/css/fontsize.css";
			aA1.style.display='block';
			aA2.style.display='none';
		} else { 
			csslink.href="/css/fontsize_big.css";
			aA1.style.display='none';
			aA2.style.display='block';
		}
		postcss("newcss="+css, sessionID);
	}
}