FUNCTION:  URL.isValid

URL.isValid(URL)
 
The URL.isValid function returns a boolean value that signifies whether the given absolute or relative URL is of the correct syntax for a URL. A true is returned if the syntax is correct. A false is returned if the syntax is not correct.
 
The syntax of a URL is:
 
scheme://host:port/path;parameters$query#fragment
 
Note that this function does not provide a reason as to why a syntax is invalid. Further, simply because the syntax is of a valid form and a true is returned, does not guarantee that the URL address is correct and that the browser can successfully navigate to the site.
 
The mandatory url parameter is any absolute or relative URL that you to wish to test.
 
Code for IsValidExample.wml
<?xml version="1.0"?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN"
"http://www.WAPforum.org/DTD/wml_1.1.xml">
<wml>

<card id="card1">
   <p>
   isValid example
   </p>
   <do type="accept">
      <go href="IsValidExample.wmls#findisvalid()" />
   </do>
</card>

<card id="card2">
<p>
   valid = $(valid)
</p>
</card>

</wml>

 
Code for IsValidExample.wmls
extern function findisvalid()
{
   var testurl = Dialogs.prompt("Enter the URL", "");
   var val = URL.isValid(testurl);
   WMLBrowser.setVar("valid", val);
   WMLBrowser.go("IsValidExample.wml#card2");
};


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