// JScript File

    function ValidateSearchInput()
    {
        //Check if the user has entered some values:
        var SearchText, SearchTextBox;
        SearchTextBox = document.getElementById("keywords");
        if (SearchTextBox != null)
        {
            SearchText = SearchTextBox.value;
            SearchText = SearchText.replace(/^\s*|\s*$/g,"");
            if (SearchText == "")
            {
                SearchTextBox.focus();
                alert("Please enter a search criteria");
                return false;
            }            
        }
        var cb_Amz,cb_Yah,cb_Shp,cb_Eby;
        cb_Amz = document.getElementById("amazon");
        cb_Yah = document.getElementById("yahoo");
        cb_Shp = document.getElementById("shopping");
        cb_Eby = document.getElementById("ebay");
        
        if ((cb_Amz != null) && (cb_Yah != null) && (cb_Shp != null) && (cb_Eby != null))
        {        
            //if ((cb_Amz.checked != "true")&&(cb_Yah.checked != "true")&&(cb_Shp.checked != "true")&&(cb_Eby.checked != "true"))
            if ((!cb_Amz.checked) && (!cb_Yah.checked) && (!cb_Shp.checked) && (!cb_Eby.checked))
            {
                alert("Please select at least one checkbox");
                return false;
            }
        }
    
        return true;
    }