function validateform()
{
var emailFilter=/^.+@.+\..{2,3}$/;
var illegalChars= /[\(\)\<\>\,\;\:\\\/\"\[\]]/
var wwwillegalChars= /[\ \*\@\&\?\.\,\|\!\£\$\%\^\_\+\=\{\}\'\~\#\(\)\<\>\,\;\:\\\/\"\[\]]/

	if (!(emailFilter.test(document.survey.email.value))) 
	{ 
	   alert("Please enter a valid email address.")
	   return false;
	}
  
   if (document.survey.email.value.match(illegalChars)) 
	{
        alert("Please enter a valid email address.")
        return false;
	}

	if(document.survey.email.value=="")
	{
		alert("Please enter a valid email address    ");
		return false;
	}
}

function MM_findObj(n, d) { //v3.0
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document); return x;
}