function WaitViewerText(){
		document.write ("<div id='waitBox' style='position:absolute; visibility:hidden; z-index:10000; border:solid 0px #ffffff;'>");
		document.write ("<img src=img/loading_img.gif border=0>");
		document.write ("</div>");
 
		wh = document.body.offsetHeight/2 - waitBox.offsetHeight/2;
		ww = document.body.offsetWidth/2 - waitBox.offsetWidth/2;
		waitBox.style.top = wh;
		waitBox.style.left = ww;
		waitBox.style.visibility = "visible";
	}
	function WaitViewer(){
		waitBox.style.visibility = "";
	}
 
	function close_wating() {
		waitBox.style.visibility = "hidden";
	}