//作品切换
function r_tab(id){
	//alert(id);
	for(var i=1;i<=5;i++){
		if(id==i){
				document.getElementById("wmenu_"+i).className="wmenu_2";
				document.getElementById("wworks_"+i).className="is_hidden_2";
				
		}else{
				document.getElementById("wworks_"+i).className="is_hidden_1";
				document.getElementById("wmenu_"+i).className="wmenu_1";
		}
	}
}



function leftSearch(){
	var s=document.left_search.stype;   
	var aa=s.options[s.selectedIndex].value;
	//alert(aa);
	switch(aa){
		case '1':
		//alert(aa);
		document.left_search.action="product.php";
		break;
		case '2':
		document.left_search.action="article.php";
		break;
		case '3':
		document.left_search.action="konwledge_class.php";
		break;
		case '4':
		document.left_search.action="article.php?class_1_id=5";
		break;
	}
	//alert(document.left_search.action);
}


function img_box(src){
			document.getElementById("img_box").src=src;
}
function img_box_v(src){
			document.getElementById("img_boxv").src=src;
}



function   validateEmail(emailStr) 
{ 
var   re=/^[\w.-]+@([0-9a-z][\w-]+\.)+[a-z]{2,3}$/i; 
if(re.test(emailStr)) 
return   true; 
else 
{ 
return   false; 
} 
}