determine if a button exists

crabgrass · Dec 18, 2007

I need to disable a button IF it exists. Something like

if (document.forms[0].cmdPeople1){
document.forms[0].cmdPeople1.disabled = true ;
}

Would there be a correct syntax for this?

kaht · Dec 19, 2007

You're on the right track. Did you try the code to see if it works?

Here's an example:

Code:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "[URL unfurl="true"]http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">[/URL]
<html xmlns="[URL unfurl="true"]http://www.w3.org/1999/xhtml">[/URL]
<head>
<title>test</title>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<script type="text/javascript">

window.onload = function () {
   var a = document.getElementById("blah");
   var b = document.getElementById("i_dont_exist");
   if (a) {
      alert("blah is disabled");
      a.disabled = "disabled";
   }
   if (b) {
      alert("i_dont_exist is disabled");
      b.disabled = "disabled";
   }
};

</script>
<style type="text/css"></style>
</head>
<body>

<input type="button" value="click me" id="blah" />

</body>
</html>

-kaht

Lisa, if you don't like your job you don't strike. You just go in every day and do it really half-assed. That's the American way. - Homer Simpson

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determine if a button exists

crabgrass

Technical User

kaht

Programmer

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