function swap(x,tab){
	if(tab.className!='current'){
		var y,w;
		var dividerLeftHot='/images/pt_tabs_divider_hl.gif';
		var dividerRightHot='/images/pt_tabs_divider_hr.gif';

		w=x-1;
		y=x+1;

		if(x==1){
			dividerLeftHot='/images/pt_tabs_divider_lh.gif'
			if(document.getElementById('tab'+y).className=='current'){
				dividerRightHot='/images/pt_tabs_divider_h.gif'
			}
		}else if(x==9){
			dividerRightHot='/images/pt_tabs_divider_rh.gif'
			if(document.getElementById('tab'+w).className=='current'){
				dividerLeftHot='/images/pt_tabs_divider_h.gif'
			}
		}else{
			if(document.getElementById('tab'+w).className=='current'){
				dividerLeftHot='/images/pt_tabs_divider_h.gif'
			}
			if(document.getElementById('tab'+y).className=='current'){
				dividerRightHot='/images/pt_tabs_divider_h.gif'
			}
		}

		document.getElementById('divider'+x).src=dividerLeftHot;
		document.getElementById('divider'+y).src=dividerRightHot;
	}
}

function swapBack(x,tab){
	if(tab.className!='current'){
		var y,w;
		var dividerLeft='/images/pt_tabs_divider.gif';
		var dividerRight='/images/pt_tabs_divider.gif';

		w=x-1;
		y=x+1;

		if(x==1){
			dividerLeft='/images/pt_tabs_divider_l.gif'
			if(document.getElementById('tab'+y).className=='current'){
				dividerRight='/images/pt_tabs_divider_hl.gif'
			}
		}else if(x==9){
			dividerRight='/images/pt_tabs_divider_r.gif'
			if(document.getElementById('tab'+w).className=='current'){
				dividerLeft='/images/pt_tabs_divider_hr.gif'
			}
		}else{
			if(document.getElementById('tab'+w).className=='current'){
				dividerLeft='/images/pt_tabs_divider_hr.gif'
			}
			if(document.getElementById('tab'+y).className=='current'){
				dividerRight='/images/pt_tabs_divider_hl.gif'
			}
		}

		document.getElementById('divider'+x).src=dividerLeft;
		document.getElementById('divider'+y).src=dividerRight;
	}
}

function setCurrent(x){
	var allTabs=document.getElementById('pt_tabs').getElementsByTagName('a');
	for(var i=0;i<allTabs.length;i++){
		allTabs[i].className='';
	}
	document.getElementById('tab'+x).className='current';
	document.getElementById('screenshot').src='/images/pt_screen_0'+x+'.gif';
	var allExplanations=document.getElementById('pt_explanations').getElementsByTagName('div');
	for(var i=0;i<allExplanations.length;i++){
		allExplanations[i].style.display='none';
	}
	document.getElementById('explanation_'+x).style.display='block';
	var next=x+1;
	var previous=x-1;
	if(x==9){next=1}
	document.getElementById('next').style.display='inline';
	document.getElementById('prevnextdivider').style.display='inline';
	document.getElementById('previous').style.display='inline';
	if(x==1){document.getElementById('previous').style.display='none';document.getElementById('prevnextdivider').style.display='none';}
	document.getElementById('next').href='javascript:setCurrent('+next+')';
	document.getElementById('previous').href='javascript:setCurrent('+previous+')';

	var allDividers=document.getElementById('pt_tabs').getElementsByTagName('img');
	for(var i=0;i<allDividers.length;i++){
		if(i==0){
			if(document.getElementById('tab1').className=='current'){
				allDividers[i].src='/images/pt_tabs_divider_lh.gif';
			}else{
				allDividers[i].src='/images/pt_tabs_divider_l.gif';
			}
		}else if(i==9){
			if(document.getElementById('tab9').className=='current'){
				allDividers[i-1].src='/images/pt_tabs_divider_hl.gif';
				allDividers[i].src='/images/pt_tabs_divider_rh.gif';
			}else{
				allDividers[i].src='/images/pt_tabs_divider_r.gif';
			}
		}else{
			if((document.getElementById('tab'+i))&&(document.getElementById('tab'+i).className=='current')){
				allDividers[i].src='/images/pt_tabs_divider_hr.gif';
				if(i!=1){
					allDividers[i-1].src='/images/pt_tabs_divider_hl.gif';
				}
			}else{
				allDividers[i].src='/images/pt_tabs_divider.gif';
			}
		}
	}
}