function popup(ort, x, y) {
	win = window.open(ort, "Fenster", "toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=no,width=" + x + ",height=" + y);
	win.focus();
}
function popupNoScroll(ort, x, y) {
	win = window.open(ort, "Fenster", "width=" + x + ",height=" + y + ",toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,copyhistory=no");
	win.focus();
	win.resizeTo(x, y);
}

function addLoadEvent(func) {
	var oldonload = window.onload;
	if (typeof window.onload != 'function') {
		window.onload = func;
	} else {
		window.onload = function() {	oldonload();func();		}
	}
}
addLoadEvent(onfocus_change);
	
function onfocus_change(){
	_i=document.getElementsByTagName("input");
	for(var i=0;i<_i.length;i++){
		_i[i].onclick=function(){	
			if(/ onfocus_change/.test(this.className)){	
						this.value="";
						this.className=this.className.replace(" onfocus_change","");	
			}
		}
	}
}