// JavaScript Document

function show_alert()
{

  if(document.contactForm.uname.value=="")
    	{
		   alert("Please enter your name");
		   document.contactForm.uname.focus();
		   return false;
    	}
  if(document.getElementById('email').value.length==0)
	  	{
		   alert("Please enter your  E-mail address");
		   document.contactForm.email.focus();
		    return false;
	  	}
    else if(normEmailvalid()==false)
	    {
		  alert('Please enter your valid  E-mail address');
		  document.contactForm.email.focus();
		  return false;
	    }
	return true;	
}
function normEmailvalid()
{

 var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   var address = document.getElementById("email").value;
   
   if(reg.test(address) == false) 
   {
     
     return false;
   }
   
   return true;
}