how to fix jqgrid height fixed dynamically

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jQuery

JQGrid

we can set jqgrid height using struts2 tag like this



< sjg:grid
.
.
.
.
height="500px"
.
.
.
>



I need to set the height dynamically by calculating the window size.I tried like this

var height=window.innerHeight;
$("#gridId").jqGrid("setGridHeight",height);



The problem is that when the number of data changes inside the grid the height is also varying, can't we fix the height as struts2 tag does?...by passing data dynamically