// JavaScript Document]

//画像切り替え
function Image(img){
	document.getElementById("image").src = img;
}

//テキストエリア文字数制限
function limitChars(target, maxlength){
    if(target.value.length > maxlength){
		alert("500 over");
		target.value = target.value.substr(0, maxlength);
	}
	target.focus();
}

//２度押し防止
var set = 0;
function double(){
    if(set == 0){
	    set = 1;
	}else{
	    alert( "please wait..." );
	    return false;
	}
}