if(!Array.prototype.toSource) {
        function array_tosource(){
                st = "";
                for(var i=0;i<this.length;i++) {
                        tEl = this[i];
                        switch(typeof tEl){
                                case "string":
                                        st+="\"" + tEl.replace(/"/g,"\\\"") + "\"";
                                        break;
                                case "object":
                                        st+=tEl.toSource();
                                        break;
                                default:
                                        st+=tEl
                        }
                        if(i<this.length-1)st+=","
                }
                return "[" + st + "]"
        }
        Array.prototype.toSource = array_tosource;
}

if(!Array.prototype.shift) {
        function array_shift() {
                firstElement = this[0];
                this.reverse();
                this.length = Math.max(this.length-1,0);
                this.reverse();
                return firstElement;
        }

        Array.prototype.shift = array_shift;
}

if(!Array.prototype.unshift) {
        function array_unshift() {
                this.reverse();
                for(var i=arguments.length-1;i>=0;i--){
                        this[this.length]=arguments[i]
                }
                this.reverse();
                return this.length
        }
        Array.prototype.unshift = array_unshift;
}

if(Array.prototype.push && ([0].push(true)==true))Array.prototype.push = null;
if(Array.prototype.splice && typeof([0].splice(0))=="number")Array.prototype.splice = null;

if(!Array.prototype.push) {

        function array_push() {
                for(i=0;i<arguments.length;i++){
                        this[this.length]=arguments[i]
                };
                return this.length;
        }
        Array.prototype.push = array_push;

}

if(!Array.prototype.pop) {

        function array_pop(){
            lastElement = this[this.length-1];
                this.length = Math.max(this.length-1,0);
            return lastElement;
        }

        Array.prototype.pop = array_pop;

}

if(!Array.prototype.splice) {

        function array_splice(ind){
                if(ind==null) return ind;
                if(ind<0) ind = this.length + ind;
                if(ind > this.length) {
                        if(arguments.length>2) ind = this.length;
                        else return [];
                }
                cnt = arguments[1] ? arguments[1] : this.length-ind;

                firstArray = [];
                secondArray = [];
                thirdArray = [];

                for(var i=0;i<this.length;i++){
                        tEl = this[i];
                        if(i<ind) firstArray.push(tEl);
                        else if(i<ind+cnt) secondArray.push(tEl);
                        else thirdArray.push(tEl);
                }

                this.length = firstArray.length;
                for(i=2;i<arguments.length;i++){
                        this.push(arguments[i]);
                }
                this.concat(thirdArray);
                return secondArray;
        }

        Array.prototype.splice = array_splice;

}

function trim(str)
{
 while(str.charAt(0)==" ") 
 {
  str=str.substr(1);
 }
 while(str.charAt(str.length-1)==" ") 
 {
  str=str.substring(0,str.length-1);
 }
 return str; 
 
}

function onSubmit(fm)
{
        var username = fm.username.value;
        username = trim(username);
        if(username == "")
        {
                alert("邮箱地址不能为空，请输入邮箱地址!")
                fm.username.focus();
                return false;
        }

        var domainname = fm.domainname.value;
        domainname = trim(domainname);
        if(domainname == "")
        {
                alert("邮箱域名不能为空，请输入邮箱域名!")
                fm.domainname.focus();
                return false;
        }

        if(domainname.indexOf(".") == -1)
                domainname += ".sina.net";
        
        var psws = fm.psw.value;
        if(psws == "")
        {
                alert("密码不能为空，请输入密码！");
                fm.psw.focus();
                return false;
        }
        
        fm.user.value = username + '@' + domainname;
        do_sha1(fm);
        fm.psw.value = "";

        //alert("psw hash: "+fm.pass.value);
        return true;
}

function wc(name,value){
        var e = new Date ();
        e.setTime (e.getTime() + (365*24*60*60*1000));
        e = e.toGMTString()
        document.cookie=name+"="+value+";path=/;expires="+e+";domain=mail.sina.net;"
        //alert(document.cookie);
}

// convert a 32-bit value to a 8-char hex string
function cvt_hex( val )
{
   var str="";
   var i;
   var v;

   for( i=7; i>=0; i-- )
   {
      v = (val>>>(i*4))&0x0f;
      str += v.toString(16);
   }
   return str;
}

// return a hex value LSB first
function lsb_hex( val )
{
   var str="";
   var i;
   var vh;
   var vl;

   for( i=0; i<=6; i+=2 )
   {
      vh = (val>>>(i*4+4))&0x0f;
      vl = (val>>>(i*4))&0x0f;
      str += vh.toString(16) + vl.toString(16);
   }
   return str;
}

// rotate left circular
function rotate_left( n, s )
{
   var t4 = ( n<<s ) | (n>>>(32-s));
   return t4;
}

// calculate the hash
function do_sha1(fm)
{
   var blockstart;                      // which block of words from the dataare we using now?
   var i, j;
   var W = new Array(80);
   // initial constants
   var H0 = 0x67452301;
   var H1 = 0xEFCDAB89;
   var H2 = 0x98BADCFE;
   var H3 = 0x10325476;
   var H4 = 0xC3D2E1F0;
   // working variables
   var A, B, C, D, E;
   var temp;

   // get message to hash
   var msg = fm.psw.value;

   // note current length
   var msg_len = msg.length;

   // convert to a 32-bit word array
   var word_array = new Array();
   for( i=0; i<msg_len-3; i+=4 )
   {
      // convert 4 bytes to a word
      j = msg.charCodeAt(i)<<24 | msg.charCodeAt(i+1)<<16 |
                msg.charCodeAt(i+2)<<8 | msg.charCodeAt(i+3);
      word_array.push( j );
   }

   // handle final bits, add beginning of padding: 1 bit, then 0 bits
   switch( msg_len % 4 )
   {
      case 0:
         // text length was a multiple of 4 bytes, start padding
         i = 0x080000000;                               // 4 bytes padding
         break;

      case 1:
         // one byte of text left
         i = msg.charCodeAt(msg_len-1)<<24 | 0x0800000; // 3 bytes padding
         break;

      case 2:
         // two bytes of text left
         i = msg.charCodeAt(msg_len-2)<<24 | msg.charCodeAt(msg_len-1)<<16
                | 0x08000;                              // 2 bytes padding
         break;

      case 3:
         // three bytes of text left
         i = msg.charCodeAt(msg_len-3)<<24 | msg.charCodeAt(msg_len-2)<<16
                | msg.charCodeAt(msg_len-1)<<8  | 0x80; // 1 byte padding
         break;

      default:
         window.alert("Something went weird in the switch!")
         return;
   }

   // handle the end of the text and beginning of the padding
   word_array.push( i );

   // pad to 448 bits (mod 512 bits) = 14 words (mod 16 words)
   while( (word_array.length % 16) != 14 )
      word_array.push( 0 );

   // add 64-bit message length (in bits)
   word_array.push( msg_len>>>29 );
   word_array.push( (msg_len<<3)&0x0ffffffff );

   // Process each 16-word block.
   for ( blockstart=0; blockstart<word_array.length; blockstart+=16 )
   {
      // create entries in W array
      for( i=0; i<16; i++ )
         W[i] = word_array[blockstart+i];
      for( i=16; i<=79; i++ )
         W[i] = rotate_left(W[i-3] ^ W[i-8] ^ W[i-14] ^ W[i-16], 1);

      // copy state
      A = H0;
      B = H1;
      C = H2;
      D = H3;
      E = H4;

      // update state variables
      for( i= 0; i<=19; i++ )
      {
         temp = (rotate_left(A,5) + ((B&C) | (~B&D)) + E + W[i] + 0x5A827999) & 0x0ffffffff;

         // update state
         E = D;
         D = C;
         C = rotate_left(B,30);
         B = A;
         A = temp;
      }

      for( i=20; i<=39; i++ )
      {
         temp = (rotate_left(A,5) + (B ^ C ^ D) + E + W[i] + 0x6ED9EBA1) & 0x0ffffffff;

         // update state
         E = D;
         D = C;
         C = rotate_left(B,30);
         B = A;
         A = temp;
      }

      for( i=40; i<=59; i++ )
      {
         temp = (rotate_left(A,5) + ((B&C) | (B&D) | (C&D)) + E + W[i] + 0x8F1BBCDC) & 0x0ffffffff;

         // update state
         E = D;
         D = C;
         C = rotate_left(B,30);
         B = A;
         A = temp;
      }

      for( i=60; i<=79; i++ )
      {
        temp = (rotate_left(A,5) + (B ^ C ^ D) + E + W[i] + 0x6CA62C1D6) & 0x0ffffffff;

         // update state
         E = D;
         D = C;
         C = rotate_left(B,30);
         B = A;
         A = temp;
      }

      H0 = (H0 + A) & 0x0ffffffff;
      H1 = (H1 + B) & 0x0ffffffff;
      H2 = (H2 + C) & 0x0ffffffff;
      H3 = (H3 + D) & 0x0ffffffff;
      H4 = (H4 + E) & 0x0ffffffff;

   } // of loop on i

   // process output
   fm.pass.value = cvt_hex(H0) + cvt_hex(H1) + cvt_hex(H2)
                + cvt_hex(H3) + cvt_hex(H4);
}