function deleteTextarea(){
   document.getElementById('kontakt_nachricht').value='';
}

function wop(theURL,winName,features)
    {
	window.open(theURL,winName,features);
    }
function lightUP(id)
    {
        var thisObj = eval("document.getElementById('" + id + "').style");
        thisObj.background='#f6f6f6';
    }

function lightBACK(id)
    {
	var thisObj = eval("document.getElementById('" + id + "').style");
        thisObj.background='transparent';
    }