// set tab menu
function secBoard(elementID,listName,n) {
 var elem = document.getElementById(elementID);
 var elemlist = elem.getElementsByTagName("li");
 for (var i=0; i<elemlist.length; i++) {
  elemlist[i].className = "normal";
  var m = i+1;
  document.getElementById(listName+"_"+m).className = "normal";
 }
  elemlist[n-1].className = "current";
  document.getElementById(listName+"_"+n).className = "current";
}

function popwin(){
	 var x=document.getElementById("popdiv");
    if(x.style.display=="block"){
        x.style.display="none";
    }else{
        x.style.display="block";
    }
}

function doZoom(size){
	document.getElementById("contents").style.fontSize=size+"px";
	}
function checkSearch(){
	var key=document.searchFrm.keyword.value
	if(key=="")
		{alert("请输入搜索关键字");return false;}
	else if(contain(key,"%*!_=+")){
			alert("含有非法字符");
			return false;
		}
	else{document.searchFrm.submit();}	
	}
//contain dangerous char
function contain(str,charset)
{  
var i;
for(i=0;i<charset.length;i++){
if(str.indexOf(charset.charAt(i))>=0)
    return true;}
return false;
}
function pop_buy(but){
	var obj=document.getElementById("popup_buy");
	 if(obj.style.display=="block"){
        obj.style.display="none";
		document.body.removeChild(document.getElementById("popupbg"));
		document.getElementById("buyiframe").src="";
    }else{
		if(but.form.buynum.value==""){
			alert("请输入要查询的产品类型");
			return false;
		}
		var popbg=document.createElement("div");	//背景遮罩层
		popbg.setAttribute("id","popupbg");
		popbg.className="popupbg";
		document.body.appendChild(popbg);
        obj.style.display="block";
    }
}