// JavaScript Document

function validate()
{
    if (document.getElementById('Name').value=="")
    {
        alert("Please enter the name");
        document.getElementById('Name').focus();
        return false;
    }
	else if (document.getElementById('Telephone').value=="")
    {
        alert("Please enter the telephone");
        document.getElementById('Telephone').focus();
        return false;
    }
    else if (document.getElementById('Email').value=="")
    {
        alert("Please enter the email");
        document.getElementById('Email').focus();
        return false;
    }
    else if (document.getElementById('Email').value!="")
    {
         var str=document.getElementById('Email').value;
         //var filter=/^.+@.+\..{2,3}$/
		 var filter=/^[a-zA-Z0-9._-]+@([a-zA-Z0-9.-]+\.)+[a-zA-Z0-9.-]{2,4}$/;

         if (filter.test(str)) {
            //return true;
	     }  else {
		 	alert("Please input a valid email address!")
	        return false
	     }
    } else {
		return true;
	}
}