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<html><body><form action=""> <select name="customers" onchange="showCustomer(this.value)"><option value="">Select a customer:</option><option value="ALFKI">Alfreds Futterkiste</option><option value="NORTS ">North/South</option><option value="WOLZA">Wolski Zajazd</option></select></form><p id="demo">Customer info will be listed here...</p><script>function showCustomer(str) { var xmlhttp; if (str == "") { document.getElementById("demo").innerHTML = ""; return; } xmlhttp = new XMLHttpRequest(); xmlhttp.onreadystatechange = function() { if (this.readyState == 4 && this.status == 200) { document.getElementById("demo").innerHTML = this.responseText; } }; xmlhttp.open("GET", "getcustomer.asp?q="+str, true); xmlhttp.send();}</script></body></html>