function trim(str)
    {
        // This function is used for chcking if user has typed white spaces in the control
       return str.replace(/^\s*|\s*$/g,"");
    }

function getCourseListing()
    {
        if(trim(document.getElementById("cmbcourseCategory").value) == "")
        {
            alert("Please select your course category.")
            document.getElementById("cmbcourseCategory").focus();
            return false;
        }
        
       /*
        if(trim(document.getElementById("cmbcourse").value) == "")
        {
            alert("Please select your course")
            document.getElementById("cmbcourse").focus();
            return false;
        }
        */
        
        
    }