function browserCheck(){ 
	this.ver=navigator.appVersion;
	this.agent=navigator.userAgent;
	this.dom=document.getElementById?1:0;
	this.opera5=this.agent.indexOf("Opera 5")>-1;
	this.opera6=this.agent.indexOf("Opera 6")>-1;
	this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom && !this.opera5)?1:0;
	this.ie6=(this.ver.indexOf("MSIE 6")>-1 && this.dom && !this.opera5)?1:0;
	this.ie7=(this.ver.indexOf("MSIE 7")>-1 && this.dom && !this.opera5)?1:0;
	this.ie4=(document.all && !this.dom && !this.opera5)?1:0;
	this.ie=this.ie4||this.ie5||this.ie6;
	this.mac=this.agent.indexOf("Mac")>-1;
	this.ns6=(this.dom && parseInt(this.ver) >= 5) ?1:0; 
	this.ns4=(document.layers && !this.dom)?1:0;
	this.bw=(this.ie6 || this.ie5 || this.ie4 || this.ns4 || this.ns6 || this.opera5 || this.opera6);
	return this;
}

bw=new browserCheck(); //Browsercheck object


function checkBrowser(){
	if (bw.ie5 || bw.ie6 || bw.ie7 || bw.ns6 || bw.opera5 || bw.opera6) window.location.href = 'screencheck.html';
	else window.location.href = 'versionsfehler.html';
}


function checkScreen() {
	var h=screen.height;
	var w=screen.width;
	if (h<768 & w<929) {
	window.location = "screenfehler.html";
	} 
	else
	{
	window.location = "index_start.html";
	}
}