function changewm(str) {
	change1="tag_"+str;
	change2="top_"+str;
	document.getElementById("tag_week").className='';
	document.getElementById("tag_month").className='';
	document.getElementById("top_week").style.display='none';
	document.getElementById("top_month").style.display='none';
	document.getElementById(change1).className='tagon';
	document.getElementById(change2).style.display='';
}

function tophottag(num,obj) {
    var tagon=getElementsByClassName('tophot','tagon');
    tagon[0].className = '';
    obj.className = 'tagon';
    for(i = 1; i < 3; i++) {
        document.getElementById('tophottag'+i).style.display='none';
    }
    document.getElementById('tophottag'+num).style.display='';
}

function torichtag(num,obj) {
    var tagon=getElementsByClassName('torich','tagon');
    tagon[0].className = '';
    obj.className = 'tagon';
    for(i = 1; i < 4; i++) {
        document.getElementById('torichtag'+i).style.display='none';
    }
    document.getElementById('torichtag'+num).style.display='';
}