Goto to page xx Form

I'm not sure what language this may be in, html or javascript i think. Any i need an input form that you type the file name in and in goes the the file
Like sometimes on website you see: skip to page...
like that

 

I found this code from The Javascript source, it's long but is easy to understand:

<!-- This script and many more are available free online at -->
<!-- The JavaScript Source!! http://javascript.internet.com -->
<!-- Original:  Vladimir Geshanov -->

<!-- Web Site:  http://hotarea.com/ -->

<script language="JavaScript"> 

function openDir( form ) { 

	var newIndex = form.fieldname.selectedIndex; 

	if ( newIndex == 0 ) { 

		alert( "Please select a location!" ); 

	} else { 

		cururl = form.fieldname.options[ newIndex ].value; 

		window.location.assign( cururl ); 

	} 

} 

</script> 

 

<table width=100% cellpadding=4 cellspacing=0 border=0> 

<form name=form> 

	<tr> 

		<td nowrap> 

			<select name="fieldname" size="1" 

				onChange="openDir( this.form )"> 

				<option>Jump To </option> 

				<option value=http://javascript.internet.com>JSS</option> 

				<option value=http://internet.com>internet.com</option> 

			</select> 

		</td> 

	</tr> 

</form> 

</table> 



<p><center>

<font face="arial, helvetica" size"-2">Free JavaScripts provided<br>

by <a href="http://javascriptsource.com">The JavaScript Source</a></font>

</center><p>

Code (markup):

Basically you would put a code in the "<form name=form>" form like <option value=http://yoursite.com>yoursite.com</option> to open any page you want.

 

how do you change that you the user can insert the file name want to go to
Eg the put in "Image.png"
and it goes to
www.example.com/uploads/Image.png