function HideandUNhideObj(ThisObj){ 

if (ThisObj !== "box1") { document.getElementById('box1').className = 'myHide';  }
if (document.getElementById(ThisObj).className == 'myHide') { 
	document.getElementById(ThisObj).className = 'myShow'; 
}
else { 
	document.getElementById(ThisObj).className = 'myHide'; 
	} 

}