//check whether the file of the AttachmentForm is null
function checkattachnull(){
var theForm = document.forms[0];
if(theForm.attachment.value===""){
window.alert("\u8bf7\u9009\u62e9\u8981\u4e0a\u4f20\u7684\u9644\u4ef6\uff01");
return false;
}
}
function checkdelfile(){
        //var theForm = document.forms[0];
        if(document.getElementById("upfiles")===null||document.getElementById("upfiles").value===""){
        window.alert("\u8bf7\u9009\u62e9\u8981\u4e0a\u4f20\u7684\u9644\u4ef6\uff01");
        return false;
         }
}
function checkregdata() {
var theForm = document.forms[0];
if(theForm.userName.value===""){
window.alert("\u8bf7\u8f93\u5165\u7528\u6237\u540d!");
theForm.userName.focus();
return false;
}if(theForm.password.value===""||theForm.password.value.length<6){
window.alert("\u5bc6\u7801\u957f\u5ea6\u4e3a6-20\u4f4d!");
theForm.password.value="";
theForm.password.focus();
return false;
}if(theForm.password2.value===""||theForm.password2.value.length<6){
window.alert("\u5bc6\u7801\u957f\u5ea6\u4e3a6-20\u4f4d!");
theForm.password2.value="";
theForm.password2.focus();
return false;
}if((theForm.password.value)!=(theForm.password2.value)){
window.alert("\u4e24\u6b21\u8f93\u5165\u5bc6\u7801\u4e0d\u4e00\u81f4!");
theForm.password.value="";
theForm.password2.value="";
theForm.password.focus();
return false;
}if(theForm.email.value===""){
window.alert("\u8bf7\u586b\u5199\u90ae\u7bb1\uff0c\u5426\u5219\u65e0\u6cd5\u6fc0\u6d3b\u7528\u6237\uff01");
theForm.email.focus();
return false;
}if(theForm.email.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) === -1){
window.alert("\u90ae\u7bb1\u683c\u5f0f\u4e0d\u6b63\u786e\uff01");
theForm.email.focus();
return false;
}
}
function checkname(url){
var theForm = document.forms[0];
if(theForm.userName.value===""){
  window.alert("\u8bf7\u8f93\u5165\u7528\u6237\u540d!");
  theForm.userName.focus();
 // return false;
 }else{
  var name=theForm.userName.value;
  window.open(url+"?username="+name,"", "location=no,toolbar=no,status=no,height=200,width=300,left=88,top=88");
 }
}