php mysql query

[r_amin]

i want to check that my ID already exist in my db or not.
I cannot complete my pages. Please help.

user side script

    sql = "Select * FROM usrtbl Where myID='" & Text1 & "'"
        path = "http://localhost/name.php?sql="
        myPath = path & sql 

I want to sent this query to my server side script page. That is

<?php 
$host="localhost"; 
$user="root"; 
$db="ant"; 
$link=mysql_connect($host,$user) or die ("Couldnot connect".mysql_error()); 
if ($link) { 
    mysql_select_db($db) or die ("Couldn't".mysql_error()); 
    } 
    $result=mysql_query('sql'); 

    $num_rows=mysql_num_rows($result); 
    if ($num_rows > 0) 
    { 
    print"1"; 
    }else{ 
    print"0"; 
    } 
?>

Do anybody Please Correct these both script.
(Please don't change this idea : I want to make the total sql from user page then process it to server side page)