function viewTab(curTab){
	var allTab=new Array('special','windo','tab3','tab4','tab5','tab6','tab7');
	for(var i=0;i<allTab.length;i++){
		document.getElementById(allTab[i]+'_left').innerHTML='';
		document.getElementById(allTab[i]).style.display='none';
	}
	document.getElementById(curTab).style.display='';
}