function ClearFieldOnFocus(tField, tValue) {
    if (tField.value == tValue ) {
        tField.value = "";
    } else {
        tField.select();
    }
}

function SetFieldOnBlur(tField, tValue) {
    if (tField.value == "") {
        tField.value = tValue;
    } 
}

function DoSearch(tFieldName) {
    var tField = document.getElementById(tFieldName);
    if (tField) {
        //alert('field: ' + tField.name);
        if (tField.value != "") {
            location.href='/ProductSearch.aspx?q=' + tField.value;
        }
    }
    
}