function HideDiv(ID) {
	document.getElementById(ID).style.display='none';
}
		
function ShowDiv(ID){
	document.getElementById(ID).style.display='';
}
		
function ShowHideDiv(ID){
	if(document.getElementById(ID).style.display==''){
		HideDiv(ID);
	}else{
		HideAll("cat",10);
		ShowDiv(ID);
	}
}
		
function HideAll(prefix,iterations){
	for (i=1;i<=iterations;i++){
		HideDiv(prefix+i);
	}
}