function TagSwitch(one,two,three,Four){
var i=1;
var j=1;
while(document.getElementById(two+i)!=null){document.getElementById(two+i).className=three;i++;}
document.getElementById(two+one).className=Four;

while(document.getElementById(two+j+"b")!=null){document.getElementById(two+j+"b").style.display="none";j++;}
document.getElementById(two+one+"b").style.display="block";

}