function P7_swapClass(){ //v1.4 by PVII
  var i,x,tB,j=0,tA=new Array(),arg=P7_swapClass.arguments;
  if(document.getElementsByTagName){
    for(i=4;i<arg.length;i++){
      tB=document.getElementsByTagName(arg[i]);
      for(x=0;x<tB.length;x++){
        tA[j]=tB[x];j++;
      }
    }
    for(i=0;i<tA.length;i++){
      if(tA[i].className){
        if(tA[i].id==arg[1]){
          if(arg[0]==1){
            tA[i].className=(tA[i].className==arg[3])?arg[2]:arg[3];
          }
          else{
            tA[i].className=arg[2];
          }
        }
        else if(arg[0]==1 && arg[1]=='none'){
          if(tA[i].className==arg[2] || tA[i].className==arg[3]){
            tA[i].className=(tA[i].className==arg[3])?arg[2]:arg[3];
          }
        }
        else if(tA[i].className==arg[2]){
          tA[i].className=arg[3];
        }
      }
    }
  }
}