// JavaScript Document
function change(){
var type = document.getElementById('type')
document.getElementById('condition').length = 0
var condition = document.getElementById("condition")
document.getElementById('search_key').style.display = ''
switch(type.options[type.selectedIndex].value){
case "article":
condition.options[0]=new Option("作文标题","title")
condition.options[1]=new Option("作者昵称","alias")
break;
case "users":
condition.options[0]=new Option("用户昵称","alias")
break;
case "wxs":
condition.options[0]=new Option("文学社名","wxsName")
condition.options[1]=new Option("社长昵称","alias")
break;
case "zwjs":
condition.options[0]=new Option("教室名称","zwjsName")
condition.options[1]=new Option("教师昵称","alias")
break;
case "pk":
condition.options[0]=new Option("PK标题","title")
break;
case 'level':
condition.options[0]=new Option("0级至15级","1")
condition.options[1]=new Option("16级至30级","2")
condition.options[2]=new Option("31级至45级","3")
condition.options[3]=new Option("46级至60级","4")
condition.options[4]=new Option("61级至75级","5")
condition.options[5]=new Option("76级以上","6")
document.getElementById('search_key').style.display = 'none'
break;
   }
}

change();