<!-- Form Validating Javascript add "_ck" to id field to have validated  -->
function check_form(form)
{
    return_boolean = true
    obj = eval(form)
    for(i=0;i<obj.length;i++)
    {
        field_name = obj.elements[i].id;
        if (field_name.indexOf("_ck") != -1)
        {
	        if (obj.elements[i].value == "")
	        {
	            obj.elements[i].style.backgroundColor = "yellow";
	            return_boolean = false
	        }
	        else
	        {
	            obj.elements[i].style.backgroundColor = "white";
	        }
        }
    } 
    return return_boolean;
}