How to submit form on keypress?

Question

I use this script to search in a static page

But i want this to search when i type in the text input and not when i click the button, i searchd and i found that any of this would work:

onkeypress="this.submit();"
onkeyup="this.submit();"
onkeypress="document.forms["f1"].submit();"
onkeyup="document.forms["f1"].submit();"

but none of them works

i used the same html with the script's

<form id="f1" name="f1" action="javascript:void()" onsubmit="if(this.t1.value!=null &amp;&amp; this.t1.value!='')parent.findString(this.t1.value);return false;">
<input type="text" id="t1" name="t1" value="Search" onfocus="if(this.value=='Search')this.value='';" size="20" onkeypress="this.submit();" />
<input type="submit" name="b1" value="Find" />
</form>

Answer 1

form.submit() does not trigger onsubmit. You should implement a function instead.

Your onkeyup script is counter-intuitive though, since selecting the text onkeyup requires blurring of the textbox focus.

Created a test using your snippets that calls findString(this.value); instead of submit:

http://jsfiddle.net/e9Esz/

some sample text
<form id="f1" name="f1" action="javascript:void(0)" onsubmit="if(this.t1.value!=null &amp;&amp; this.t1.value!='')parent.findString(this.t1.value);return false;">
<input type="text" id="t1" name="t1" value="Search" onfocus="if(this.value=='Search')this.value='';" size="20" onkeyup="findString(this.value);" />
<input type="submit" id="b1" name="b1" value="Find" />
</form>

Javascript:

var TRange=null;

function findString (str) {
 if (parseInt(navigator.appVersion)<4) return;
 var strFound;
 if (window.find) {

  // CODE FOR BROWSERS THAT SUPPORT window.find

  strFound=self.find(str);
  if (!strFound) {
   strFound=self.find(str,0,1);
   while (self.find(str,0,1)) continue;
  }
 }
 else if (navigator.appName.indexOf("Microsoft")!=-1) {

  // EXPLORER-SPECIFIC CODE

  if (TRange!=null) {
   TRange.collapse(false);
   strFound=TRange.findText(str);
   if (strFound) TRange.select();
  }
  if (TRange==null || strFound==0) {
   TRange=self.document.body.createTextRange();
   strFound=TRange.findText(str);
   if (strFound) TRange.select();
  }
 }
 else if (navigator.appName=="Opera") {
  alert ("Opera browsers not supported, sorry...")
  return;
 }
 if (!strFound) alert ("String '"+str+"' not found!")
 return;
}

Answer 2

You have a quote problem! The color coding here shows it!

onkeypress="document.forms["f1"].submit();"
           ^                ^
         opens           closes

The sumbit is on the form, not the element, hence why this.submit fails.

You would need

this.form.submit()