/* Email validation 
------------------------------------------------------------------ */
function checkform(){
      var reMail = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
      if (document.contact.name.value == '') {
        document.contact.name.focus();
        alert("Please Type Name !");
        return(false);
      }
     
      if ((document.contact.mail.value == '') || !reMail.exec(document.contact.mail.value)) 	{
        alert("Please Type Valid E-mail Address!");
        document.contact.mail.focus();
        return(false);
      }
       if (document.contact.comments.value == '') {
        alert("Please Type Comments !");
        document.contact.comments.focus();
        return(false);
      }
      return(document.contact.submit());
    }

/* Show/Hide 
------------------------------------------------------------------ */
function showHide(ele, ele1, ele2){
var x, y, z;
if ( document.getElementById
&& (x = document.getElementById(ele))
&& x.style )
{
x.style.display = ('none' == x.style.display)? '' : 'none' ;
}
if ( document.getElementById
&& (y = document.getElementById(ele1))
&& y.style )
{
y.style.display = ('none' == y.style.display)? '' : 'none' ;
}
if ( document.getElementById
&& (z = document.getElementById(ele2))
&& z.style )
{
z.style.display = ('none' == z.style.display)? '' : 'none' ;
}
}