function $(id){
return document.getElementById(id);
}
function changecheckcode(imgid,url){
$(imgid).src=url+"?r="+Math.random();
}
function inputnum(obj){
obj.value=obj.value.replace(/[^\.\d]/g,'');
//if(obj.value.split('.').length>2){
//obj.value=obj.value.split('.')[0]+'.'+obj.value.split('.')[1]
//}
if(obj.value.indexOf('.')>-1){
obj.value=obj.value.replace('.','');
}
}

function inputdenum(obj){
obj.value=obj.value.replace(/[^\.\d]/g,'');
if(obj.value.split('.').length>2){
obj.value=obj.value.split('.')[0]+'.'+obj.value.split('.')[1]
}
}

function onitext(obj,v){
if(obj.value==v){
obj.value="";
}
}

function outtext(obj,v){
if(obj.value==""){
obj.value=v;
}
}

function showtype(showid,hid1,hid2,id1,id1bg,id2,id2bg,id3,id3bg){
$(showid).style.display="block";
$(hid1).style.display="none";
$(hid2).style.display="none";
$(id1).style.backgroundImage="url("+id1bg+")";
$(id2).style.backgroundImage="url("+id2bg+")";
$(id3).style.backgroundImage="url("+id3bg+")";
}

function addfav(title,url) {
if (window.sidebar) {
window.sidebar.addPanel(title, url,"");
} else if( document.all ) {
window.external.AddFavorite( url, title);
} else if( window.opera && window.print ) {
return true;
}
}

function checkloginform(frm){
if(frm.txt_uname.value==""){alert("请输入用户名");frm.txt_uname.focus();return false;}
if(frm.txt_upwd.value==""){alert("请输入密码");frm.txt_upwd.focus();return false;}
if(frm.txt_ccode!=null){if(frm.txt_ccode.value.length!=4){alert("请输入验证码(4位数字)");frm.txt_ccode.focus();return false;}}
var ltp = document.getElementsByName("login_type");
var flag = false; 
for(i=0;i<ltp.length;i++){
if(ltp[i].checked){
flag=true;break;
}
}
if(!flag){
alert("请选择登录类型");return false;
}
frm.action="login.aspx";
}