//targetElement = 書き換え後のエレメント
function sendRequestMail(body, targetElement) {
	var url = '/request/send/';
	var body = body;
	var parameters = 'body=' + body;
	new Ajax.Request(url, {
	method: 'post',
	parameters: parameters,
	onSuccess:function(httpObj){
		targetElement.innerHTML = httpObj.responseText;
	},
	onFailure:function(httpObj){
	},
	onException: function(httpObj) {
	}
	});
}