function SetTab(tab)
{
    if (document.all) {
        document.getElementById('ctl00_home').setAttribute('className','nav') ;
        document.getElementById('ctl00_about').setAttribute('className','nav') ;
        document.getElementById('ctl00_identify').setAttribute('className','nav') ;
        document.getElementById('ctl00_removal').setAttribute('className','nav') ;
        document.getElementById('ctl00_products').setAttribute('className','nav') ;
        document.getElementById('ctl00_illness').setAttribute('className','nav') ;
    
        document.getElementById('ctl00_' + tab).setAttribute('className','selected') ; 
    } else
    {
        document.getElementById('ctl00_home').setAttribute('class','nav') ;
        document.getElementById('ctl00_about').setAttribute('class','nav') ;
        document.getElementById('ctl00_identify').setAttribute('class','nav') ;
        document.getElementById('ctl00_removal').setAttribute('class','nav') ;
        document.getElementById('ctl00_products').setAttribute('class','nav') ;
        document.getElementById('ctl00_illness').setAttribute('class','nav') ;
    
        document.getElementById('ctl00_' + tab).setAttribute('class','selected') ; }

}

function ClearTextBox(sElement,sValue)
{
   if   ( sElement.value.length == 0 )
        {
          sElement.value = sValue ;
        }
   else {
       
   // the textbox onclick event calls this to clear down a textbox when it is first clicked on
        if ( sElement.value == sValue )
            {
             sElement.value = "" ;
            }
        }
}