function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   alert("Invalid e-mail address!")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Invalid e-mail address!")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Invalid e-mail address!")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Invalid e-mail address!")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Invalid e-mail address!")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Invalid e-mail address!")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("Invalid e-mail address!")
		    return false
		 }

 		 return true					
	}

function validateForm(){

  if(document.linkrequest.name.value == "")
    {
      alert('Please enter your name!');
      document.linkrequest.name.focus();
      return false;
    }

  var emailID=document.linkrequest.emailaddress
	
    if ((emailID.value==null)||(emailID.value=="")){
	alert("Please enter your e-mail address!")
	emailID.focus()
	return false
	}
    if (echeck(emailID.value)==false){
	emailID.value=""
	emailID.focus()
	return false
	}

  if(document.linkrequest.title.value == "")
    {
      alert('Please enter a title for your website!');
      document.linkrequest.title.focus();
      return false;
    }

  if(document.linkrequest.url.value == "")
    {
      alert('Please enter the URL of your website!');
      document.linkrequest.url.focus();
      return false;
    }

  if(document.linkrequest.description.value == "")
    {
      alert('Please enter a description for your website!');
      document.linkrequest.description.focus();
      return false;
    }

  if(document.linkrequest.reciprocallink.value == "")
    {
      alert('Please enter the reciprocal link to our website!');
      document.linkrequest.reciprocallink.focus();
      return false;
    }

  if(document.linkrequest.captcha1.value != "18")
    {
      alert('Please try again!');
      document.linkrequest.captcha1.value = "";
      document.linkrequest.captcha1.focus();
      return false;
    }

  if(document.linkrequest.captcha2.value != "")
    {
      alert('Please try again!');
      return false;
    }
    return true
 }