var mode;
var sortby='';


function changeTextSize(mode) {

        if (mode == "increase") {
            textSize = YAHOO.util.Dom.getStyle("mainwrap", "font-size");
            textSize = Number(textSize.substring(0,2));
            if (textSize < 15) {
                textSize = textSize+1;
                YAHOO.util.Dom.setStyle("mainwrap", "font-size", String(textSize) + "px");
            }
        }
        else if (mode == "decrease") {
            textSize = YAHOO.util.Dom.getStyle("mainwrap", "font-size");
            textSize = Number(textSize.substring(0,2));
            if (textSize > 26) {
                textSize = textSize-1;
                YAHOO.util.Dom.setStyle("mainwrap", "font-size", String(textSize) + "px");
            }
        }
        else {
            YAHOO.util.Dom.setStyle("mainwrap", "font-size", "12px");
        }
}

function bgr_color(oldidname, idname) {
	if (idname == 'jbi_selected') {
		document.getElementById('jbi_highlight').style.color = "black";
	}
	if (idname == 'jbi_unselected') {
		document.getElementById('jbi_highlight').style.color = "white";
	}
	document.getElementById(oldidname).setAttribute('id',idname);
	
}

function bgr_color_click(oldidname, idname) {
	//document.getElementById(id,image).style.backgroundImage = "url(/extension/hio/design/hio/images/studkat/Navigasjon/"+image+".gif)";
	document.getElementById(oldidname).setAttribute('id',idname);
}

function bgr_studieaar(idname) {
	document.getElementById("studieaar").style.background = "url(/extension/hio/design/hio/images/studkat/"+idname+")"; 
}

function bgr_image(oldidname,idname,img) {
	var valg = "nr_"+img;
	var gammelid = oldidname;

	document.getElementById(idname).style.backgroundImage = "url(/extension/hio/design/hio/images/studkat/menyforside/selected/"+img+".jpg)";
	var cn = 'tabs';
	var divs = document.getElementsByTagName('div');
	var rx=new RegExp('\\b' + cn + '\\b');
	
	for ( var i=0; i<divs.length; i++) {
		if (rx.test(divs[i].className))
			if (divs[i].style.display == 'block') {
				divs[i].style.display = 'none';
					if (document.getElementById(valg)) {
                				document.getElementById(valg).style.display = "block";
						return;
					}
			}
	}
	
	/*document.getElementById(oldidname).setAttribute('id',img);*/
}



function bgr_image_out(idname,img) {
	var valg = "nr_"+img;
        document.getElementById(idname).style.backgroundImage = "url(/extension/hio/design/hio/images/studkat/menyforside/unselected/"+img+".jpg)";
	
	/*if (document.getElementById(valg)) {
		document.getElementById(valg).style.display = "";
	}*/
}

function sort_func (tagname) {
	
	var list = document.getElementById("sort");
	
	/*alert(document.getElementById("list").childNodes.length);*/
	for (var i=0; i<document.getElementById("list").childNodes.length; i++){
       	
		document.getElementById("list").childNodes[i].innerHTML = tagname;
        }
	
	this.sortby = tagname;
}

function sort_by () {
	return this.sortby;
}