function xmlhttpPost(strURL,val) {
    var xmlHttpReq = false;
    var self = this;
    // Mozilla/Safari
    if (window.XMLHttpRequest) {
        self.xmlHttpReq = new XMLHttpRequest();
    }
    // IE
    else if (window.ActiveXObject) {
        self.xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
    }
    self.xmlHttpReq.open('GET', strURL+"?w="+escape(val), true);
    self.xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    self.xmlHttpReq.onreadystatechange = function() {
        if (self.xmlHttpReq.readyState == 4) {
            updatepage(self.xmlHttpReq.responseText,val);
        }
    }
    self.xmlHttpReq.send();
}

function updatepage(str,val){
//    document.getElementById("partsFrame").src = 'show.parts.php?brand='+escape(val);   
    document.getElementById("partNum").innerHTML = str;
}