Algorithm root:
In general, the 9th digit of the vehicle identification code is the inspection bit, which can be indicated by any number or letter "X" in 0-9. The number of other positions and the meaning of the letters may be different, but after the other 16-bit codewords of the VIN code are determined, the test bit of the nineth bit is calculated according to the following method.
First, convert the letters in the other 16 digits to numbers in the following relation:
A=1 B=2 C=3 D=4 E=5 F=6 G=7 H=8 J=1 K=2 L=3 M=4 N=5 P=7 R=9 S=2 T=3 U=4 V=5 W=6 X=7 Y=8 Z=9
Each position has a weighted number:
Location: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16-17
Weights: 8 7 6 5 4 3 2 10 * 9 8 7 6 5-4 3 2
Finally, the weighted coefficients of each of the 16 bits outside the test bit are multiplied by the corresponding values of the bits, then the products are added together, and divided by 11, the remainder is the value of the test bit. If the remainder is 10, the test bit is the letter "X".
JS Code:
Copy Code code as follows:
<script type= "Text/javascript" >
var Arr = new Array ();
var Brr = new Array ();
arr[' A '] = 1;
arr[' B '] = 2;
arr[' C '] = 3;
arr[' D '] = 4;
arr[' E '] = 5;
arr[' F '] = 6;
arr[' G '] = 7;
arr[' H '] = 8;
arr[' J '] = 1;
arr[' K '] = 2;
arr[' L '] = 3;
arr[' M '] = 4;
arr[' N '] = 5;
arr[' P '] = 7;
arr[' R '] = 9;
arr[' S '] = 2;
arr[' T '] = 3;
arr[' U '] = 4;
arr[' V '] = 5;
arr[' W '] = 6;
arr[' X '] = 7;
arr[' Y '] = 8;
arr[' Z '] = 9;
arr[' 1 '] = 1;
arr[' 2 '] = 2;
arr[' 3 '] = 3;
arr[' 4 '] = 4;
arr[' 5 '] = 5;
arr[' 6 '] = 6;
arr[' 7 '] = 7;
arr[' 8 '] = 8;
arr[' 9 '] = 9;
arr[' 0 '] = 0;
brr[1]=8;
brr[2]=7;
brr[3]=6;
brr[4]=5;
brr[5]=4;
brr[6]=3;
brr[7]=2;
brr[8]=10;
brr[9]=0;
brr[10]=9;
brr[11]=8;
brr[12]=7;
brr[13]=6;
brr[14]=5;
brr[15]=4;
brr[16]=3;
brr[17]=2;
function Getcheckcode (Svin)
{
var skyzf= "ABCDEFGHJKLMNPRSTUVWXYZ1234567890";
var sjyw = ';
var bl = false;
var blkyzf = false;
if (svin.length = 17)
{
var ijqs=0,inttemp=0;
HT = ARR;
HTZM = BRR;
Try
{
for (var i = 0; I <sVIN.length; i++)
{
if (Skyzf.indexof (Svin.substr (i, 1))!=-1)
{
Blkyzf = true;
Ijqs = Ijqs + parseint (ht[svin.substr (i, 1)]) * parseint (htzm[(i + 1)]);
}
Else
{
Blkyzf = false;
Break
}
}
if (BLKYZF)
{
IntTemp = ijqs%11;
if (intTemp = 10)
{
Sjyw = "X";
}
Else
{
Sjyw = Inttemp.tostring ();
}
if (Sjyw = = Svin.substr (8, 1)) BL = true;
}
Else
{
BL = false;
}
}
catch (Err)
{
BL = false;
}
}
return BL;
}
Alert (Getcheckcode ("wvgab97pxcd010692"));
</script>
