var browser, ison;

function detectbrowser() {
	var id=navigator.userAgent;
	if (id.indexOf("MSIE 6")!=-1) { 
		browser=2; 
		document.write("<link href=\"http://www.fuv.com/fileadmin/user_upload/startseite/2009/ie6styles.css\" rel=\"stylesheet\" type=\"text/css\" media=\"all\" />"); 
	} else if (id.indexOf("MSIE 7")!=-1 || id.indexOf("MSIE 8")!=-1) { 
		browser=3; 
		document.write("<link href=\"http://www.fuv.com/fileadmin/user_upload/startseite/2009/ie7styles.css\" rel=\"stylesheet\" type=\"text/css\" media=\"all\" />"); 
	} else browser=1; // der Rest bekommt Firefox-Styles, der IE6 braucht den Transparenz-Fix, der IE7 im BTO-Logo
}

function bluremall(){ 
if(document.getElementsByTagName) { 
	var a = document.getElementsByTagName("a"); 
	for (var i = 0; i < a.length; i++){  
		a[i].onfocus = function(){this.blur();}; 
		} 
	} 
} 

function onoff(id,state) {
	if (document.getElementById(id)!=null) {
		document.getElementById(id).style.visibility=state;
	}
}

function opacity(id, opacStart, opacEnd, millisec) { 
    var speed = Math.round(millisec / 100); 
    var timer = 0; 
    if(opacStart > opacEnd) { 
        for(i = opacStart; i >= opacEnd; i--) { 
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed)); 
            timer++; 
        } 
    } else if(opacStart < opacEnd) { 
        for(i = opacStart; i <= opacEnd; i++) 
            { 
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed)); 
            timer++; 
        } 
    } 
} 

function changeOpac(opacity, id) { 
    if (document.getElementById(id)!=null) {
		var object = document.getElementById(id).style; 
    	object.opacity = (opacity / 100);  
    	object.MozOpacity = (opacity / 100); 
    	object.KhtmlOpacity = (opacity / 100); 
    	object.filter = "alpha(opacity=" + opacity + ")";
		if (browser==3) { document.getElementById('fuvolux').style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src='fileadmin/user_upload/startseite/2009/images/fuvolux.png',sizingMethod='crop')"; }
	}
} 

function mousesensitive(nr) {
	if (nr==1 && ison!=1) {
		changeOpac(0,'handelshaustext');onoff('handelshaustext','visible');onoff('industrietext','hidden');onoff('systemhaustext','hidden');onoff('allgemeintext','hidden');opacity('handelshaustext',0,100,200);	
		ison=1;
	} else if (nr==2 && ison!=2) {
		changeOpac(0,'industrietext');onoff('industrietext','visible');onoff('handelshaustext','hidden');onoff('systemhaustext','hidden');onoff('allgemeintext','hidden');opacity('industrietext',0,100,200);
		ison=2;
	} else if (nr==3 && ison!=3) {
		changeOpac(0,'systemhaustext');onoff('systemhaustext','visible');onoff('handelshaustext','hidden');onoff('industrietext','hidden');onoff('allgemeintext','hidden');opacity('systemhaustext',0,100,200);
		ison=3;
	} else if (nr==4 && ison!=4) {
		changeOpac(0,'allgemeintext');onoff('allgemeintext','visible');onoff('handelshaustext','hidden');onoff('industrietext','hidden');onoff('systemhaustext','hidden');opacity('allgemeintext',0,100,200);
		ison=4;
	}
}


detectbrowser();


window.onload=function() { 
	bluremall();
	changeOpac(0,'handelshaustext');
	changeOpac(0,'industrietext');
	changeOpac(0,'systemhaustext');
	ison=4;
}