Ecirce: Undo and Redo in forms - goforwardgobackwardform Version 1.0


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Undo and Redo in forms - goforwardgobackward Form v 1.0

related:

MoveUpnDown form v2.0

Demo: To see how it works change the textfields and click "undo" or "redo".
input0:
input1:
input2:
input3:

choose ya grade:

Browser: ie4+,ns4+ (only input elements type=text);
Contributor: © 2003 Simon Carl Wessely
Script-size: 3.5 kb
uploaded: 17 07 03
last modified: 17 07 03

Step 1: Paste the following code between
the <body> tag and </body> tag:

var formlength=8 //number of form-elements

var inputarray=[]
var currentover,level;
var counterarray=-1;
function theonload(){
for(i=0;i<formlength;i++){
if(document.inputform[i].type=='radio'||document.inputform[i].type=='checkbox')document.inputform[i].inputcheckboxorradio=true;
else document.inputform[i].inputcheckboxorradio=false;
document.inputform[i].onfocus=saveVal
document.inputform[i].onchange=catchVal}
}

function saveVal(){
this.thisvirgin=this
this.thisvirginvalue=this.inputcheckboxorradio?this.checked:this.value;
}

if(typeof inputarray[counterarray-1]!='undefined'){
   if(inputarray[counterarray-1].inputcheckboxorradio){
   inputarray[counterarray-1].checked=inputarray[counterarray];}
   else inputarray[counterarray-1].value=inputarray[counterarray]
}}

function goforward(){
if(typeof currentover=='undefined')return;
level--;
counterarray=eval(inputarray.length-3-level*4);

if(counterarray<0||counterarray>(inputarray.length-3)){level++;return}

if(typeof inputarray[counterarray-1]!='undefined'){
   if(inputarray[counterarray-1].inputcheckboxorradio)inputarray[counterarray-1].checked=inputarray[counterarray];
   else inputarray[counterarray-1].value=inputarray[counterarray]
}}
window.onload=theonload;
</script>

<form action="" method="" target="" name="inputform">
input0: <input type="Text" name="input0" value="input0" size="9" maxlength="">
<br>
input1: <input type="Text" name="input1" value="input1" size="9" maxlength="">
<br>
input2: <input type="Text" name="input2" value="input2" size="9" maxlength="">
<br>
input3: <input type="Text" name="input3" value="input3" size="9" maxlength="">
<br>
<input type="Radio" name="asdf" value="v">
<br>
<input type="Checkbox" name="sadfsdafe" value="v">
<br>
<input type="Radio" name="asdfe" value="v">
<br>
choose ya grade: <select name="asdf" size="">
<option value="A">A
<option value="B">B
<option value="C">C
<option value="D">D
</select>
<br>

<br>

Step 2: Enter the correct number of your form elements