//切换表格显示
function showClassBox(num){
    for(i=1;i<4;i++){
        document.getElementById('classbox'+i).style.display='none';
        document.getElementById('classbox'+num).style.display='block';
        document.getElementById('class'+i).className='';
        document.getElementById('class'+i).getElementsByTagName('a')[0].className='navtit';
        document.getElementById('class'+num).className='class_hot';
        document.getElementById('class'+num).getElementsByTagName('a')[0].className='navtit_hot';
    }
}
//字体大小切换
function ContentSize(size)
{
	var obj=document.all.ContentBody;
	obj.style.fontSize=size+"px";
}
//头像切换
function showhead(){
	document.images.myhead.src="/images/head/"+document.form.sex.options[document.form.sex.selectedIndex].value+document.form.img.options[document.form.img.selectedIndex].value+".gif";
}