var xmlHttp;
function   createXMLHttpRequest()   {   
if   (window.ActiveXObject)   {xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");}     
else   if   (window.XMLHttpRequest) {xmlHttp   =   new  XMLHttpRequest();}   
} 


function isEmail(str) 
{ 
var re=/^[\w.-]+@([0-9a-z][\w-]+\.)+[a-z]{2,4}$/; 
if(re.test(str))
return true;
else
return false;
} 

function changecode()
{
var t=new Date();
document.getElementById("codeimg").src='/modules/code.php?id='+t;
}

function check_login(){
var fn=document.user_login;
if(!fn.l_user_name.value){alert('请输入您的用户名！');return false;}
if(!fn.l_user_pwd.value){alert('请输入您的密码！');return false;}
if(!fn.l_code.value){alert('请输入验证码！');return false;}
fn.action='/index.php?main_page=login';
}



var col = new Array(); 
col[15] = '#000000'; 
col[14] = '#111111'; 
col[13] = '#222222'; 
col[12] = '#333333'; 
col[11] = '#444444'; 
col[10] = '#555555'; 
col[9] = '#666666'; 
col[8] = '#777777'; 
col[7] = '#888888'; 
col[6] = '#999999'; 
col[5] = '#AAAAAA'; 
col[4] = '#BBBBBB'; 
col[3] = '#CCCCCC'; 
col[2] = '#DDDDDD'; 
col[1] = '#EEEEEE'; 
col[0] = '#FFFFFF'; 

function zt_Over(i) 
{ 
if (i>=0) {
if(i==0){document.searchs.keyword.value='';document.searchs.keyword.style.color='#000';}
document.searchs.keyword.style.color=col[i];
i--;
setTimeout('zt_Over('+i+')',20);
} 
} 






function checksearch(){
	var fn=document.searchs;
	if(!fn.keyword.value||fn.keyword.value=='请输入搜索关键词'){fn.keyword.value='请输入搜索关键词';zt_Over(15);return false;}
}





function CheckSel(Voption,Value)
{
 var obj = document.getElementById(Voption);
 for (i=0;i<obj.length;i++){
  if (obj.options[i].value==Value){
  obj.options[i].selected=true;
  break;
  }
 }
}