function browser() {
	var browser	= navigator.userAgent;
	
	if (browser.indexOf('Gecko')>-1) return "FF"; //Mozilla og Netscape
	else if (browser.indexOf('Opera')>-1) return "Opera"; //Opera
	else if (browser.indexOf('MSIE')>-1) return "IE"; //Internet Explorer
	else return false;
}

function str_replace(ch,nch,str){
    var chl = ch.length;
    var nchl = nch.length;
    var i = str.indexOf(ch);
    while(i>-1){
        str = str.substring(0,i)+nch+str.substring(i+chl);
        i = str.indexOf(ch,i+nchl);
    }
    return str;
}

function onhover(row,antal) {
	for(i=1;i<=antal;i++) {
		document.getElementById('row_' + row + '_' + i).style.backgroundColor = '#CCCCCC';
	}
}

function outhover(row,antal,color) {
	for(i=1;i<=antal;i++) {
		document.getElementById('row_' + row + '_' + i).style.backgroundColor = color;
	}
}

function popupvindue(url,width,height) {
	var isIE	= (navigator.appName.indexOf('Microsoft') > -1)? 1 : 0;
	
	var swidth	= (isIE)? document.body.clientWidth : window.innerWidth;
	var sheight	= (isIE)? document.body.clientHeight : window.innerHeight;
	
	var left	= (swidth - width) / 2;
	var top		= (sheight - height) / 2;
	
	var popup	= window.open(url,'popup','left=' + left + ',top=' + top + ',width=' + width + ',height=' + height);
	
	popup.focus();
	
	return false;
}