function setContact(name,host1,host2){
	if(document.getElementById('email')){
		var at='@';
		var address=name+at+host1+host2;
		cont = document.getElementById('email');
		var tg='<';
		var lol=tg+'a hr'+'ef=mai'+'lto:'+address;
		var pan = '>'+address+tg+"/a>";		
		cont.innerHTML = lol+pan;
	}
}
// 初期化
window.onload=function(){
	setContact("bannai","math.ke","io.ac.jp");
}