function submitForm (form) {
	var arg_str = "Please fill the following fields, which are mandatory:\n";
	var arg = "";
	if (form.name.value == "") {
		arg += "Name, ";
	}
	if (form.surname.value == "") {
		arg += "Surname, ";
	}
	if (!echeck(form.email.value)) {
		arg += "valid e-mail address, ";
	} 
	
	if (arg || !form.agree.checked) {
		arg = arg_str + arg;
		arg = arg.substr(0, (arg.length - 2));
		arg += ";";
		if (!form.agree.checked) {
			arg += "\n You must agree with the Terms and Conditions!";
		}
		alert(arg);
	} else {
		form.submit();
	}
}

/**
 * DHTML email validation script. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
 */

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){
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    return false
		 }

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

 		 return true					
	}