[javascript] 키보드 숫자만 입력받게 하기

/**
 *	숫자만 입력받게 하기
 *	ex) this.$el.find("#inp-call").on("keydown", _.bind(this.onKeydown_inputPhone, this))
 *	onKeydown_inputPhone : function(e){
 *		return App.appView.utilView.onlyNumberTypeInput(e);
 *	}
 */
function onlyNumberTypeInput(event){
	event = event || window.event;
	var keyID = (event.which) ? event.which : event.keyCode;

	if( ( keyID >=48 && keyID <= 57 ) || ( keyID >=96 && keyID <= 105 ) || keyID == 8
            || keyID == 9 || keyID == 46 || keyID == 37 || keyID == 39 )
	{
		return;
	}
	else
	{
		return false;
	}
}