//检测搜索框
function checksearch(){
		var searchType = document.getElementById("searchform").searchType;
		var searchTarget = new Array("/topic.php?channelID=1&topicID=228&action=search","/topic.php?channelID=5&topicID=225");
		var searchTips = new Array("产品名称","批号/产品名称");
		for(i=0;i<searchType.length;i++){
			if(searchType[i].checked){
				document.getElementById("searchform").action=searchTarget[i];//更改搜索目标地址

				//如果是初始数值才改变
				if(checkstringinarray(document.getElementById("searchform").searchKeyword.value,searchTips) == true)
					document.getElementById("searchform").searchKeyword.value = searchTips[i];
			}
		}
}

//判断一个字符串是否在一个数组中
function checkstringinarray(deststring,sourcearray){
	for(j=0;j<sourcearray.length;j++){
		if(deststring == sourcearray[j])return true;
	}
	return false;
}