function _$(id){return document.getElementById(id)}

//aendert den style vom feld on mouseover
function onFeldOver(obj){
	//obj.style.backgroundColor="#FFAA07";
	//obj.style.borderColor="#FFAA07";
	$(obj).css('border-color', '#FFAA07');
}
//aendert den style vom feld on mouseout
function onFeldOut(obj){
	$(obj).css('border-color', '#D9D9D9');
	//obj.style.borderColor="#D9D9D9";
}

//alle elemente kriegen die hoehe vom hoechsten element
function check_height(el_ident){
	var elts = $(el_ident);
	var maxh = 0;
	for (var i=0; i< elts.length; i++){
		if(parseInt($(elts[i]).height())>maxh){
			maxh = parseInt($(elts[i]).height());
		}
	}
	$(elts).css('height', maxh+'px');
}

function isEscPressed(e){
	if(!e) e = window.event;
	return checkKey(e,27);
}
function isEnterPressed(e){
	if(!e) e = window.event;
	return checkKey(e,13);
}
function isCtrlEnterPressed(e){
	if(!e) e = window.event;
	if(e.ctrlKey && (checkKey(e,13) || checkKey(e,10))) return true;
	return false;
}
function isCtrlLeftPressed(e){
	if(!e) e = window.event;
	if(e.ctrlKey && checkKey(e,37)) return true;
	return false;
}
function isCtrlRightPressed(e){
	if(!e) e = window.event;
	if(e.ctrlKey && checkKey(e,39)) return true;
	return false;
}
function isCtrlUpPressed(e){
	if(!e) e = window.event;
	if(e.ctrlKey && checkKey(e,38)) return true;
	return false;
}
function isCtrlDownPressed(e){
	if(!e) e = window.event;
	if(e.ctrlKey && checkKey(e,40)) return true;
	return false;
}
function isUpPressed(e){
	if(!e) e = window.event;
	if(checkKey(e,38)) return true;
	return false;
}
function isDownPressed(e){
	if(!e) e = window.event;
	if(checkKey(e,40)) return true;
	return false;
}
function isSpacePressed(e){
	if(!e) e = window.event;
	if(checkKey(e,32)) return true;
	return false;
}
function isShiftPressed(e){
	if(!e) e = window.event;
	if(e.shiftKey) return true;
	return false;
}

function checkKey(e,keyCode){
    if(e.keyCode == keyCode || e.which==keyCode) return true;
    return false;
}

function is_password(pw){
	if(pw.match("^[0-9a-zA-Z_]{5,15}$")){
		return true;
	}else{
		return false;
	}
}

function redirecturl(url){
	if(url == undefined){url = '';}
	location.href = '/' + url;
}