Why is this code not executed?

Help me see why this code is not executed & lt ;! DOCTYPE & nbsp; HTML & nbsp; PUBLIC & nbsp; "-// W3C // DTD & nbsp; HTML & nbsp; 4.01 & nbsp; Transitional // EN" & nbsp; "http: // www help me see why this code is not executed




Batch delete data





Function del (){
If (! Window. confirm ('do you want to delete data? ')){
Return false;
}
Function chek (){
Var leng = 3;
If (leng = undefined ){
Leng = 1;
If (! Form1.chk. checked)
Document. form1.chk. checked = true;
Else
Document. form1.chk. checked = false;
} Else {
For (var I = 0; I <leng; I ++)
{
If (! Form1.chk [I]. checked)
Document. form1.chk [I]. checked = true;
Else

Document. form1.chk [I]. checked = false;
}
}
Return false;
}
Script $ Conn = mysql_connect ("localhost", "root", "123456 ");
Mysql_query ("set names gb2312 ");
Mysql_select_db ("db_mingrisoft ");
?>













Echo date ('Y-m-D'). "". date (l );
?>

Browse directory
Add books
Simple query
Advanced Query
Group statistics
Exit System





If ($ action = null) or ($ _ GET [action] = "show "))
{
?>




$ Sqlstr = "select * from tb_mrbook order by id ";
$ Result = mysql_query ($ sqlstr, $ conn );
While ($ field = mysql_fetch_field ($ result )){
Echo" $ Field-> name";
}
Echo" Operation";
Echo"";

While ($ row = mysql_fetch_row ($ result )){
Echo"";
Echo" ";
Echo" ";