Data Validation

[DAVETIGHE]

Hi,

Completely new to Javascript and have a complete newbie question, looking at developing a Google maps webpage and used the link below to develop a page that reads map locations from a Google spreadsheet.

http://gmaps-samples.googlecode.com/svn/trunk/spreadsheetsmapwizard/makecustommap.htm

Have added another column to the spreadsheet and a couple of lines of code. Want to get the code to check if the string is blank before outputting the details but cannot achieve this. Any suggestions on how to amend the code below to achieve this

for (var i = 0; i < json.feed.entry.length; i++) {
var entry = json.feed.entry;

............ other code .........
?????? What do I change here?????????

if(entry["gsx$" + param_OpenHoursColumn]) {
html += "<br/> <b> Opening Hours </b>" + entry["gsx$"+param_OpenHoursColumn].$t;
}


Thanks very much.

 

[vacunita]

Assuming you want to check the entry variable:

if((entry=="") || (entry==null)){
alert("The Variable is empty or Null");
}

----------------------------------
Phil AKA Vacunita
----------------------------------
Ignorance is not necessarily Bliss, case in point:
Unknown has caused an Unknown Error on Unknown and must be shutdown to prevent damage to Unknown.

 

[DAVETIGHE]

Hi vacunita,

Thanks for the reply, it's actaully the column param_OpenHoursColumn in the entry JSON i was looking to test. Found the answer from your answer, I was using VB comaprsion operators instead of javascript ones.

if(entry["gsx$"+param_OpenHoursColumn].$t != "") {
html += "<br/> <b> Opening Hours </b>" + entry["gsx$"+param_OpenHoursColumn].$t;
}

Thanks again,
Dave

 

[ljwilson]

You really ought to take a look at jQuery and some of the validation plugins. You could have a solution that is not only a better UI experience for your users, but one that is more rebust and flexible as well.

One of my favorite validation plugins is:

http://bassistance.de/jquery-plugins/jquery-plugin-validation/