Hidden field inside gridview

We have 4 hidden fileds in gridview, we want to pass those 4 hidden field values to the javascript function which will open window.

 

asp:TemplateField HeaderText="Vendor Circuit Id">

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CommandName="VendorURL" runat="server">

var windowOptions = "dependent,width=450,height=400,scrollbars=no,resizable=yes,location=no";

function showDetails(t, c, v, b, d) { // added by ab37281 for Circuit Details

alert('YES');

window.name = "FFCL";

t = t.replace("&", "%26")

c = c.replace("&", "%26")

v = v.replace("&", "%26")

b = b.replace("&", "%26")

d = d.replace("&", "%26")

window.open(("circuitDetails.aspx?type=" + t + "&field=" + c + "&vendor=" + v + "&ban=" + b + "&billDate=" + d), "", windowOptions);

}

when we click on hyperlink it should call that javascript function and pass those 4 hidden field value from the grid.

 

Kindly please post code or ideas.