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(arg[0]==0 && arg[1]=='none') {
// comment this if if you want the menu to be closed on page load
			}
			else if(tA[i].className==arg[2]) {
				tA[i].className=arg[3];
			}
		}
	}
 }
}