function toggle(HideById,ShowById){
	document.getElementById(HideById).style.display='none';
	document.getElementById(ShowById).style.display='block';
}

function displayadv(){
	if(formValidator()){
	var firstname = document.getElementById('firstname').value;;
	var lastname = document.getElementById('lastname').value;
	var email = document.getElementById('email').value;
	var phone = document.getElementById('phone').value;
	//var textarea = document.getElementById('textarea').value;
	//document.getElementById('advertisement').style.display= 'block';
	//window.open("/contact.php?op=cv&firstname="+firstname+"&lastname="+lastname+"&email="+email+"&phone="+phone+"&displayit=yes",'test','width=400,height=500,left=0,top=0,resizable=yes,scrollbars=yes,toolbar=yes,status=yes');
	//}else{
	//	document.getElementById('advertisement').style.display= 'none';
	//
	}
}

function formValidator(){
    var firstname = document.getElementById('firstname').value;
    var lastname = document.getElementById('lastname').value;
    var email = document.getElementById('email').value;
	var phone = document.getElementById('phone').value;

    var err_message = 1;

    if(firstname == null || firstname == ""){
		document.getElementById('firstnametext').innerHTML = "<span style=\"color:red;\">שם פרטי* :</span>";
		err_message = -1;
    }else{
		document.getElementById('firstnametext').innerHTML = "<span style=\"color:#000000;\">שם פרטי :</span>";
	}
	
    if(lastname == null || lastname == ""){
		document.getElementById('lastnametext').innerHTML = "<span style=\"color:red;\">שם משפחה* :</span>";
		err_message = -1;
    }else{
		document.getElementById('lastnametext').innerHTML = "<span style=\"color:#000000;\">שם משפחה :</span>";
	}
	
	if(phone == null || phone == ""){
		document.getElementById('phonetext').innerHTML = "<span style=\"color:red;\">טלפון/פלאפון* :</span>";
		err_message = -1;
    }else{
		document.getElementById('phonetext').innerHTML = "<span style=\"color:#000000;\">טלפון/פלאפון :</span>";
	}

	if(email == null || email == ""){
		document.getElementById('emailtext').innerHTML = "<span style=\"color:red;\">Email* :</span>";
		err_message = -1;
		var email_empty = true;
    }else{
		document.getElementById('emailtext').innerHTML = "<span style=\"color:#000000;\">Email :</span>";
	}
	if(!email_empty){
		apos=email.indexOf("@")
		dotpos=email.lastIndexOf(".")
		if (apos<1||dotpos-apos<2) {
		  document.getElementById('emailtext').innerHTML = "<span style=\"color:red;display:inline;\"><nobr>Email Not Valid* :</nobr></span>";
		  err_message = -1;
		}
	}
	
	if (!filterFileType(document.contactform.cv, "doc")) {
	/* the “!” in the line above means “not” so it reverses the value of whatever is next to it. So, since an “if” statement will only run if whatever in the () is true, we want to check to see if the file in the upload field ends with .gif - if it doesn’t the filterFileType would return false - the “!” makes the statment “true” thereform the if statement runs the next line */
		document.getElementById('userInput').innerHTML = "<span style=\"color:red;display:inline;\"><nobr>העלאת קובץ קו\"ח*  : </nobr></span>";
		//alert("Please submit .doc only type files");
		document.contactform.cv.focus();
		err_message = -1;
	}else{
		document.getElementById('userInput').innerHTML = "<span style=\"color:#000000;\"><nobr>העלאת קובץ קו\"ח  : </nobr></span>";
		document.getElementById('userInput').focus();
	}
	
	if( err_message == -1 ){
		return false;
	}else{
		return true;
	}
}

function filterFileType(field, ext) {
	if (field.value.indexOf('.' + ext) == -1) {
		return false;
	}
	return true;
} // end function filterFileType