$(document).ready(function(){

	$("#opinion").keypress(function(){
		var opinion = $("#opinion").val();
		if (opinion.length > 1000) {
			opinion = opinion.substr(0,1000);
			$("#opinion").val(opinion);
		}
	});
});

function goBack() {
	history.back();
}

function checkMes(){
	var str = $("#opinion").val();
	str = str.Trim();
	if (str.length <= 0 ) {
		alert("There is no input.");
		return false;
	}
	return true;
}

String.prototype.Trim =function() {
	return this.replace(/^[ 　]+/,"").replace(/[ 　]+$/,"");
}