// getElementsByClassを有効化

function getElementsByClass(searchClass) {
	var classElements = new Array();
	var allElements = document.getElementsByTagName("*");
	for (i = 0, j = 0; i < allElements.length; i++) {

	if (allElements[i].className == searchClass) {
	classElements[j] = allElements[i];
	j++;
	}
}
	return classElements;
}




// フォームの中に事前に文字を入れておく
         function inputDefault(elm, msg) {
            this.elm     = elm;
            this.msg     = msg;
            this.color   = '#999999';
            this.bgColor = '#F9FFF9';
         }

         inputDefault.prototype.set = function() {
            this._cleared    = false;
            this._defColor   = this.elm.style.color;
            this._defBGColor = this.elm.style.backgroundColor;

            this.elm.value        = this.msg;
            this.elm.style.color  = this.color;
            this.elm.style.backgroundColor = this.bgColor;

            var _this = this;
            addEvent( this.elm,      'focus',  function() { _this.clear();  } );
            addEvent( this.elm.form, 'submit', function() { _this.submit(); } );
         }

         inputDefault.prototype.clear = function() {
            if(this._cleared) return;

            this.elm.style.color            = this._defColor;
            this.elm.style.backgroundColor  = this._defBGColor;
            this.elm.value = '';
            this._cleared  = true;
         }

         inputDefault.prototype.submit = function() {
            if(this._cleared) return;

            var _this = this;
            this.elm.disabled = true;
            window.setTimeout(function() { _this.elm.disabled = false; }, 1);
         }


	function addEvent(elm, type, event) {
		if(elm.addEventListener) {
			elm.addEventListener(type, event, false);
		} else if(elm.attachEvent) {
			elm.attachEvent('on'+type, event);
		} else {
			elm['on'+type] = event;
		}
	}