last_tab='tab1';function show(layerName){var shuffletop=document.getElementById(layerName);shuffletop.className='shuffletop';}function hide(layerName){var shufflebot=document.getElementById(layerName);shufflebot.className='shufflebot';}function show_next(tab_name){document.getElementById(last_tab).className='tab';var curr=document.getElementById(tab_name);curr.className='tab_hover';hide(last_tab+'_data');show(tab_name+'_data');last_tab=tab_name;}function backToTop(){var x1=x2=x3=0;var y1=y2=y3=0;if(document.documentElement){x1=document.documentElement.scrollLeft||0;y1=document.documentElement.scrollTop||0;}if(document.body){x2=document.body.scrollLeft||0;y2=document.body.scrollTop||0;}x3=window.scrollX||0;y3=window.scrollY||0;var x=Math.max(x1,Math.max(x2,x3));var y=Math.max(y1,Math.max(y2,y3));window.scrollTo(Math.floor(x/2),Math.floor(y/2));if(x>0||y>0){window.setTimeout("backToTop()",25);}}