function clearText(thefield){
if (thefield.defaultValue==thefield.value)
thefield.value = ""
}
function getXMLHTTP() {
    var http_request = false;

    if  (window.XMLHttpRequest) { // Mozilla, Safari, IE7.0+  ...
        http_request = new XMLHttpRequest();
    }
    else if (window.ActiveXObject)  { // IE 6.0-
        try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
        }
        catch (e) {
            try {
                alert("Microsoft.XMLHTTP")
                http_request = new ActiveXObject("Microsoft.XMLHTTP");
            }
            catch (e) {
            }
        }
    }
    return http_request;
}