function IsValidEmail(field) {
  var str = field.value;
  if (window.RegExp) {
    var reg1str = "(@.*@)|(\\.\\.)|(@\\.)|(\\.@)|(^\\.)";
    var reg2str = "^.+\\@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,3}|[0-9]{1,3})(\\]?)$";
    var reg1 = new RegExp(reg1str);
    var reg2 = new RegExp(reg2str);
    if (!reg1.test(str) && reg2.test(str))
      return true;
    return false;
  } else {
    if(str.indexOf("@") >= 0)
      return true;
    return false;
  }
}

function validasi(){
if (document.forms[0].title.value==""){
	alert("warning!\nPlease insert the Title !");
	document.forms[0].title.focus();
	return false;
}

if (document.forms[0].txturl.value=="http://"){
	alert("warning!\nPlease insert the URL !");
	document.forms[0].txturl.focus();
	return false;
}
	
if (document.forms[0].category.value==""){
	alert("warning!\nPlease insert the category !");
	document.forms[0].category.focus();
	return false;
}

if (document.forms[0].email.value==""){
	alert("warning!\nPlease insert the email !");
	document.forms[0].email.focus();
	return false;
}

if ((document.myForm.email.value.indexOf("@")==-1)||(document.myForm.email.value.indexOf("@") != document.myForm.email.value.lastIndexOf("@"))) {
		alert ("Please fill in one valid Email address");
		document.myForm.email.focus();
		return false;
	}

if (!IsValidEmail(document.forms[0].email)) {
	alert ("Please fill in a valid Email address");
	document.forms[0].email.focus();
	return false;
	}

if (document.forms[0].TextField.value==""){
	alert("warning!\nPlease insert the Short Description !");
	document.forms[0].TextField.focus();
	return false;
}

if (document.forms[0].reciprocal.value==""){
	alert("warning!\nPlease insert the Short Description !");
	document.forms[0].reciprocal.focus();
	return false;
}
	
if (document.forms[0].secure_text.value==""){
	alert("warning!\nPlease insert the code on the image !");
	document.forms[0].secure_text.focus();
	return false;
}	
	
}