Need to click a bid button with Grease monkey script

问题

I'm a bit stuck. I'm trying to create an Grease Monkey script that will automatically click an pop-up that appears on an auction site. I'v got the Xpat, but i'm too in expierienced with GM to get it to work.

Here is theelement inspection line i get from fire finder for firebug:

<input type="submit" style="width: 160px;" class="simplemodal-close" id="ctl00_mainContentPlaceholder_Button3" onclick="closePopup(); return false;" value="Back To Auctions" name="ctl00$mainContentPlaceholder$Button3">

and the firpath, xpath line is:

.//*[@id='ctl00_mainContentPlaceholder_Button3']

xpather line for full xpath:

/html/body/form[@id='aspnetForm']/div[@id='simplemodal-container']/div/div[@id='basic-modal-content']/div[@id='modal_winningBanner']/div/div[2]/div[2]/input[@id='ctl00_mainContentPlaceholder_Button3']

So what i used in my gm script to try to get it to click the button is as follows:

// @include *
// @version 0.1
// @description Automatically click // ==/UserScript==

click_popupBtn1 = function() {

var joinBtn=document.evaluate('//*[@id, "ctl00_mainContentPlaceholder_Button3"]'
    ,document,
      null,
     XPathResult.ORDERED_NODE_SNAPSHOT_TYPE,
     null).singleNodeValue.click();
  alert(joinBtn);
       if(!joinBtn) return false;
          joinBtn.click();
      return true;
}


click_popupBtn1 ();

I think ive got something wrong on the syntax, but dont know how to debug GM. I've only worked with turbo pascal a few years ago, but would like to get some simple things done in java and GM.

Any help would be apreciated.

Thanks Ludwig

回答1:

umm, I don't understand a lot of the words you used or this complex syntax.

but something like:

document.getElementById("ctl00_mainContentPlaceholder_Button3").click();

should work.

回答2:

var joinBtn=document.evaluate('//*[@id, "ctl00_mainContentPlaceholder_Button3"]'
                              ,document,      
                               null,     
                               XPathResult.ORDERED_NODE_SNAPSHOT_TYPE,
                              null).singleNodeValue.click();

The first argument above is not a syntactically legal XPath expression.

Should be:

//*[@id = "ctl00_mainContentPlaceholder_Button3"]

来源：https://stackoverflow.com/questions/6077020/need-to-click-a-bid-button-with-grease-monkey-script

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