jqGrid "SearchOnEnter:true" is not working when jqGrid placed inside the form tag

See more:

jQuery

jqGrid "SearchOnEnter:true" is not working when jqGrid placed inside the form tag..
but if i remove the jqgrid from the form tag then the option "SearchOnEnter:true" is working

ex.
[This is not working]

<form>
<table id="grid"></table>
<div id="pager"></div>
</form>

[This is working]

<table id="grid"></table>
<div id="pager"></div>

<form>
....
</form>

Can anyone please help me how to solve this ?