Selenium IDE - User-Extensions

The name it self we can find this is nothing but Extend the selenium Usage by user. I used one of the Extension GOTOIF,  this is the extend of goto command.
i.e goto and label commands help us to skip the steps and focus under the commands of label, we can extend it as
IF
<Argument>
Goto à Label 1
Else
<Execute the next line>
It can be used by Selenium IDE with following process
Goal : I need to Check the Check box if it is not already checked. If already checked i should not check (uncheck) it again.
Selenium - IDE
Command
Target
Value
StoreChecked
Check Box
On
gotoIf
${on}
T1
click
Check Box

clickAndWait
Button Save

Label
T1

clickAndWait
Element (To check the action to verify check box value change)

Verify/Assert



To get the above command we have to do the followings:
1.Copy and paste the following and save it as (.js ) javascript file
var gotoLabels= {};
var whileLabels = {};

// overload the original Selenium reset function
Selenium.prototype.reset = function() {
    // reset the labels
    this.initialiseLabels();
    // proceed with original reset code
    this.defaultTimeout = Selenium.DEFAULT_TIMEOUT;
    this.browserbot.selectWindow("null");
    this.browserbot.resetPopups();
}

Selenium.prototype.initialiseLabels = function()
{
    gotoLabels = {};
    whileLabels = { ends: {}, whiles: {} };
    var command_rows = [];
    var numCommands = testCase.commands.length;
    for (var i = 0; i < numCommands; ++i) {
        var x = testCase.commands[i];
        command_rows.push(x);
    }
    var cycles = [];
    forvar i = 0; i < command_rows.length; i++ ) {
        if (command_rows[i].type == 'command')
        switch( command_rows[i].command.toLowerCase() ) {
            case "label":
                gotoLabels[ command_rows[i].target ] = i;
                break;
            case "while":
            case "endwhile":
                cycles.push( [command_rows[i].command.toLowerCase(), i] )
                break;
        }
    } 
    var i = 0;
    while( cycles.length ) {
        if( i >= cycles.length ) {
            throw new Error( "non-matching while/endWhile found" );
        }
        switch( cycles[i][0] ) {
            case "while":
                if( ( i+1 < cycles.length ) && ( "endwhile" == cycles[i+1][0] ) ) {
                    // pair found
                    whileLabels.ends[ cycles[i+1][1] ] = cycles[i][1];
                    whileLabels.whiles[ cycles[i][1] ] = cycles[i+1][1];
                    cycles.splice( i, 2 );
                    i = 0;
                } else ++i;
                break;
            case "endwhile":
                ++i;
                break;
        }
    }
}

Selenium.prototype.continueFromRow = function( row_num )
{
    if(row_num == undefined || row_num == null || row_num < 0) {
        throw new Error( "Invalid row_num specified." );
    }
    testCase.debugContext.debugIndex = row_num;
}

// do nothing. simple label
Selenium.prototype.doLabel = function(){};

Selenium.prototype.doGotolabel = function( label )
{
    if( undefined == gotoLabels[label] ) {
        throw new Error( "Specified label '" + label + "' is not found." );
    }
    this.continueFromRow( gotoLabels[ label ] );
};

Selenium.prototype.doGoto = Selenium.prototype.doGotolabel;

Selenium.prototype.doGotoIf = function( condition, label )
{
    if( eval(condition) ) this.doGotolabel( label );
}

Selenium.prototype.doWhile = function( condition )
{
    if( !eval(condition) ) {
        var last_row = testCase.debugContext.debugIndex;
        var end_while_row = whileLabels.whiles[ last_row ];
        if( undefined == end_while_row ) throw new Error( "Corresponding 'endWhile' is not found." );
        this.continueFromRow( end_while_row );
    }
}

Selenium.prototype.doEndWhile = function()
{
    var last_row = testCase.debugContext.debugIndex;
    var while_row = whileLabels.ends[ last_row ] - 1;
    if( undefined == while_row ) throw new Error( "Corresponding 'While' is not found." );
    this.continueFromRow( while_row );
}
Selenium.prototype.doGotoIfNot = function( condition, label )
{
    if( !eval(condition) ) this.doGotolabel( label );
}
2. Open Firefox and open Selenium-IDE.
3. Click Options menu and select Options
4. Click Browse button under Selenium Core extensions (User-extensions.js) and select the js file and click OK.
5. Restart the selenium IDE.
6. From the command drop down you can find the commands gotoif and some more handled in above prototype.