Php double-click table modification through ajax

Copy codeThe Code is as follows:
<Script type = "text/javascript">
$ (Function (){

$ ("Td"). dblclick (function () {// obtain the tag
Var td = $ (this );
Var itemid = td [0]. id;
Var txt = td. text ();
Var input = $ ("<input type = 'text' value = '" + txt + "'/> ");
Td.html (input );
Input. click (function () {return false ;});
// Obtain the focus
Input. trigger ("focus ");

Input. blur (function (){
Var newtxt = $ (this). val ();

If (newtxt! = Txt ){
Td.html (newtxt );
Var caid = $. trim (td. prev (). text ());

/* Perform ajax operations in the background

Var url = "? A. php & itemid = "+ itemid +" & v = "+ newtxt; // depending on the website

$. Get (url, function (data ){
If (data = "1 ")
{
Location. reload ();
Td.html (txt );
Return;
}
Td.html (newtxt );
});

}
Else
{
Td.html (newtxt );
}
});

*/

});
});
</Script>