String.prototype.trim = function() {
    return this.replace(/^[\s\r\n　]+|[\s\r\n　]+$/g, '');
}

function is_true(n) {
	var ret = false;
	if ( n != undefined) {
		if ( (n != '') && (n != 0) && (n != '0') && (n != 'f') && (n != 'false') && (n != false) ) {
			ret = true;
		}
	}
	return ret;
}

function check_value(id) {
	return true;
}

function search_submit(src,e){
	var ret = true;
	if (!e) var e = window.event;
	if(e.keyCode == 13) {
		ret = false;
		switch (src.name) {
			case 'md':
				document.getElementById("submit_model").click();
				break;
			case 'p0':
			case 'p1':
				document.getElementById("submit_price").click();
				break;
			case 'tp':
				document.getElementById("submit_type").click();
				break;
			case 'y0':
			case 'y1':
			case 'ye':
				document.getElementById("submit_year").click();
				break;
			case 'en':
				document.getElementById("submit_engine").click();
				break;
			case 'fw':
				document.getElementById("submit_free").click();
				break;
		}
	}
	return ret;
}