function IsEmpty(aTextField) {
   if ((aTextField.value.length==0) ||
   (aTextField.value==null)) {
      return true;
   }
   else { return false; }
}

/* function source: www.w3schools.com */

function validate_email(field,alerttxt)
{
with (field)
{
apos=value.indexOf("@")
dotpos=value.lastIndexOf(".")
if (apos<1||dotpos-apos<2) 
  {alert(alerttxt);return false}
else {return true}
}
}
function validate_form()
{
    var frm = document.forms["form1"];		
	/* Check if all the fields are filled or not */
	if (IsEmpty(document.getElementById("name")))
	{
		alert("Please enter your Name.");
		return false;
	}
	else if (IsEmpty(document.getElementById("email")))
	{	
		alert("Please enter your Email.");
		return false;
	}
	else if (document.getElementById("name").value=='Enter First Name')
	{	
		alert("Please enter your Name.");
		return false;
	}
	else if (document.getElementById("email").value=='Enter Valid Email Here')
	{	
		alert("Please enter your Email.");
		return false;
	}
    else
    {
    return true;
    }		
}