Screen Customisation

To add in script code from a page set the link as follows

 <script src="../custompages/pathtofile/commlist.js" type="text/javascript" language="JavaScript"></script>

To enumerate block entries (Ref: https://community.sagecrm.com/partner_community/b/hints_tips_and_tricks/archive/2007/11/28/setting-screen-properties-within-a-multiblock-asp-page-using-the-com-api.aspx)

 //Set EntryBlock properties for an EntryGroup Block using an Enumerator
 var myE = new Enumerator(myBlock);
 while (!myE.atEnd())
 {
    myEntryBlock = myE.item();
    myEntryBlock.ReadOnly = false;
    myEntryBlock.Required = false;
    myE.moveNext();
 }

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Useful menthod to parse the querystring from the client

Ref: http://www.bloggingdeveloper.com/post/JavaScript-QueryString-ParseGet-QueryString-with-Client-Side-JavaScript.aspx

 function getQuerystring(key, default_)
 {
   if (default_==null) default_="";
   key = key.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
   var regex = new RegExp("[\\?&]"+key+"=([^&#]*)");
   var qs = regex.exec(window.location.href);
   if(qs == null)
     return default_;
   else
     return qs[1];
 }