function search_check(){
	var obj = document.getElementById("sword");
	if (obj.value==""){
		alert("請輸入關鍵字!");
		obj.select();
		return;
	}
	search_form.submit();
}
function smart_search(){
	var obj1 = document.getElementsByName("material");
	var obj2 = document.getElementsByName("thick");
	var obj3 = document.getElementsByName("character");
	if (!obj1[0].checked && !obj1[1].checked && !obj1[2].checked && !obj2[0].checked && !obj2[1].checked && !obj2[2].checked && !obj3[0].checked && !obj3[1].checked && !obj3[2].checked){
		alert("請至少選擇一項!");
		return;
	}
	smart_form.submit();
}