var PagesNum;

	jsHover = function()
	{
		var hEls = document.getElementById("nav").getElementsByTagName("LI");
		for (var i=0, len=hEls.length; i<len; i++) {
			if ((hEls[i].className == 'item2')||
				(hEls[i].className == 'item3n')||
				(hEls[i].className == 'item5')||
				(hEls[i].className == 'item6')) {
				hEls[i].onmouseover = function() { this.className+=" jshover"; }
				hEls[i].onmouseout = function() { this.className = this.className.replace(" jshover", ""); }
			}
		}
	}
	if (window.attachEvent && navigator.userAgent.indexOf("Opera")==-1) window.attachEvent("onload", jsHover);

		function box_height2 () {
		    if(document.getElementById('box')!=null && document.getElementById('box_r')!=null)
		    {
			  pageH=document.getElementById('main');
			  centerH=document.getElementById('box');
			  rightH=document.getElementById('box_r');
			  //alert(pageH.offsetHeight + '  ' + centerH.offsetHeight + '  ' + rightH.offsetHeight);
			  if (pageH.offsetHeight < 850 && centerH.offsetHeight < rightH.offsetHeight) {
			  	centerH.style.height = rightH.offsetHeight-32 + 'px';
			  }
		    }
		}
			
		function backtotop () {
		    if(document.getElementById('box')!=null && document.getElementById('box_r')!=null)
		    {
			centerH=document.getElementById('box');	
			rightH=document.getElementById('box_r');			
			df = rightH.offsetHeight - centerH.offsetHeight;			
			if (centerH.offsetHeight > 750 ) document.getElementById('backtotop_left').style.display = 'block';
			if (rightH.offsetHeight > 800 & df >= 100) document.getElementById('backtotop_right').style.display = 'block';			
			if (document.getElementById('box_r2')) {
				rightHEv=document.getElementById('box_r2');
				if (rightHEv.offsetHeight > 0) {				
					dfEv = rightHEv.offsetHeight - centerH.offsetHeight;
					if (rightHEv.offsetHeight > 800 & dfEv >= 100) document.getElementById('backtotop_right').style.display = 'block';	
				}
			}			
		    }	
		}
		
		function ShowPage (id) {
			for (var i=1; i<=PagesNum; i++) {
				document.getElementById('page_'+i).style.display = 'none';
				document.getElementById('pagelink_'+i).className = '';
			}	
			document.getElementById('page_'+id).style.display = 'block';
			document.getElementById('pagelink_'+id).className = 'active';
			box_height2();
			centerH=document.getElementById('box');
			if (centerH.offsetHeight > 750 ) document.getElementById('backtotop_left').style.display = 'block';
			else document.getElementById('backtotop_left').style.display = 'none';
		}