function showAjaxLoader() {
	obj=document.getElementById('ajaxloader');
	var t = (screen.availHeight/2)+getWindowScrollTop()- 75 - 260;		// 460 wegen Verschiebung durch neues Layout. 0,0 liegt nicht mehr ganz links oben
	//var l = 400;

	//obj.style.left=Math.floor(l)+'px';
	obj.style.top=Math.floor(t)+'px';
	obj.style.visibility='visible';
	obj.style.display='';
}

function hideAjaxLoader() {
	obj=document.getElementById('ajaxloader');
	obj.style.visibility='hidden';
}

function getWindowScrollTop() {
	if (document.documentElement && document.documentElement.scrollTop) {
		return document.documentElement.scrollTop;
	} else {
		return document.body.scrollTop;
	}
}	

function getWindowHeight() {
	if (document.documentElement && document.documentElement.offsetHeight) {
		return document.documentElement.offsetHeight;
	} else {
		return document.body.offsetHeight;
	}
}

function getSelText() {
   var txt = '';
   if (window.getSelection) {
      txt = window.getSelection();
   } else if (document.getSelection) {
      txt = document.getSelection();
   } else if (document.selection) {
      txt = document.selection.createRange().text;
   } else return;
   if(String(txt).length > 2) {
      return txt;
   } else {
      return false;
   }
};