function changeBgImage(bgImageNew,textID){	
	document.getElementById('hg_bild').style.backgroundImage = "url(" + bgImageNew + ")";    
		
	if(document.getElementById(textID).style.display == 'none') {
		ShowHideByClassName('none');
		document.getElementById(textID).style.display = 'block';
		//document.getElementById('text_main').style.display = 'none';
	}
	/*else{
		document.getElementById(textID).style.display = 'none';
		ShowHideByClassName('none');
	}*/
}

function ShowHideByClassName(displayValue)
      {
        var elems = document.getElementsByTagName("div");
        var laenge = elems.length;
        for(var i = 0; i < laenge; i++)
        {
          var elem = elems[i];
          var cls = elem.getAttribute("class");
          if(cls == "text_tip" || elem.className == "text_tip")
          {
            elem.style.display = displayValue;
          }
        }
      }