// JavaScript Document
	function search_item(){
		if(document.getElementById("selector").code.value=="none"){
			checkAll();
			alert("Please select required");
		}else if(document.getElementById("selector").type.value=="none"){
			checkAll();
			alert("Please select required");
		}else if(document.getElementById("selector").driving.value=="none"){
			checkAll();
			alert("Please select required");
		}else if(document.getElementById("selector").connection.value=="none"){
			checkAll();
			alert("Please select required");
		}else if(document.getElementById("selector").structural.value=="none"){
			checkAll();
			alert("Please select required");
		}else if(document.getElementById("selector").sealing.value=="none"){
			checkAll();
			alert("Please select required");
		}else if(document.getElementById("selector").pressure.value=="none"){
			checkAll();
			alert("Please select required");
		}else if(document.getElementById("selector").body_materials.value=="none"){
			checkAll();
			alert("Please select required");
		}else if(document.getElementById("selector").caliber.value==""){
			checkAll();
			alert("Please input Caliber");
		}else{
			document.getElementById("selector").action="search";
			document.getElementById("selector").submit();
		}
	}
	
	function checkCode(){
		if(document.getElementById("selector").code.value=="none"){
			document.getElementById("code").style.visibility="visible";
		}else{
			document.getElementById("code").style.visibility="hidden";
		}
	}
	function checkType(){
		if(document.getElementById("selector").type.value=="none"){
			document.getElementById("type").style.visibility="visible";
		}else{
			document.getElementById("type").style.visibility="hidden";
		}
	}
	function checkDriving(){
		if(document.getElementById("selector").driving.value=="none"){
			document.getElementById("driving").style.visibility="visible";
		}else{
			document.getElementById("driving").style.visibility="hidden";
		}
	}
	function checkConnection(){
		if(document.getElementById("selector").connection.value=="none"){
			document.getElementById("connection").style.visibility="visible";
		}else{
			document.getElementById("connection").style.visibility="hidden";
		}
	}
	function checkStructural(){
		if(document.getElementById("selector").structural.value=="none"){
			document.getElementById("structural").style.visibility="visible";
		}else{
			document.getElementById("structural").style.visibility="hidden";
		}
	}
	function checkSealing(){
		if(document.getElementById("selector").sealing.value=="none"){
			document.getElementById("sealing").style.visibility="visible";
		}else{
			document.getElementById("sealing").style.visibility="hidden";
		}
	}
	function checkPressure(){
		if(document.getElementById("selector").pressure.value=="none"){
			document.getElementById("pressure").style.visibility="visible";
		}else{
			document.getElementById("pressure").style.visibility="hidden";
		}
	}
	function checkBody(){
		if(document.getElementById("selector").body_materials.value=="none"){
			document.getElementById("body_materials").style.visibility="visible";
		}else{
			document.getElementById("body_materials").style.visibility="hidden";
		}
	}
	function checkCaliber(){
		if(document.getElementById("selector").caliber.value==""){
			document.getElementById("caliber").style.visibility="visible";
		}else{
			document.getElementById("caliber").style.visibility="hidden";
		}
	}
	
	function checkAll(){
		checkCode();
		checkType();
		checkDriving();
		checkConnection();
		checkStructural();
		checkSealing();
		checkPressure();
		checkBody();
		checkCaliber();
	}