function MM_findObj(n, d) { //v4.01
  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);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function isEmpty(str)
{
    for(var intLoop=0; intLoop<str.length; intLoop++)
      if(str.charAt(intLoop)!=" ")
        return false;
    return true;
}

function checkRequired ()
{
	var f= document.requestForm;
	var strError= "";
	
	if (isEmpty(f.name.value)) {
         strError +="\n Name";
	}
	if (isEmpty(f.email.value)) {
         strError +="\n Email";
	} else if (!validEmail(f.email.value)) {
		 strError +="\n Invalid Email Address";
	}
	if (isEmpty(f.interest.value)) {
         strError +="\n Interest";
	}

	//display error message
    if(strError !="") {
		alert("The following required data is missing or not valid:\n" + strError);
		return false;
    } else {
		return true;
	}
}

function validEmail(emailS) {
  if (emailS.indexOf("@") > 0 && emailS.indexOf(".") != -1 && emailS.lastIndexOf(".") < (emailS.length-2) && emailS.lastIndexOf(".")>0 && (emailS.lastIndexOf(".") - emailS.lastIndexOf("@") > 1) ) 
  {
    return true;
  } else {
    return false;
  }	
}