Javascript PreSaveAction() in SharePoint 2010

You Can Use PreSaveAction function to execute any JavaScript Code in New or Edit Forms for any SharePoint List before Saving the item.

It Validate form without PostBack.

Syntax: 

PreSaveAction()

{

//Add Your JavaScript Code Here Then Return True Or False

return false; // Cancel the item save process

return true; // OK to proceed with the save item

}

“PreSaveAction” function is JavaScript function which allow programmer to write code with in this function which will execute just before saving records. Programmers can use this function in NewForm.aspx or EditForm.aspx. 

Code Example:

<script src="/Shared%20Documents/prototype.js" type="text/javascript"></script>

<script src="/Shared%20Documents/SPUtility.js" type="text/javascript"></script>

<script type="text/javascript">

function PreSaveAction()    {

alert(SPUtility.GetSPField('Title').GetValue());

if(SPUtility.GetSPField('Title').GetValue() != null)

{

     alert('Validation passed, let SharePoint continue');

     return true;

}

else

{

alert('Validation failed, let SharePoint not continue');

     return false;

}

} </script>

To install, you’d simply place the JavaScript above into a Content Editor Web Part on your NewForm.aspx or EditForm.aspx

References:

http://ghamson.wordpress.com/2011/01/25/useful-javascript-function-presaveaction-sp2010-sharepoint-ps2010-projectserver-in/

https://www.nothingbutsharepoint.com/sites/eusp/Pages/endusersharepointcom-extending-issues-and-tasks-part-3.aspx

http://allaboutmoss.com/2010/04/07/custom-javascript-validation-in-sharepoint/

http://digsharepoint.blogspot.in/2011/05/rich-text-editor-rte-and-presaveaction.html

http://blogs.msdn.com/b/sharepointdesigner/archive/2007/06/13/using-javascript-to-manipulate-a-list-form-field.aspx

http://wael-abbas.blogspot.in/2009/02/sharepoint-presaveaction.html

http://replicrux.com/2011/11/09/validating-forms-in-sharepoint.aspx

http://replicrux.com/2011/04/07/adding-javascript-reference-to-sharepoint-2007-globally.aspx

http://sharepointgauravgoyal.blogspot.in/2012/06/presaveaction-function-in-sharepoint.html