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Verify That Atleast One Check Box Checked In The Grid

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// verify that  atleast  one check box checked in the grid



function CheckAtleastOneisChecked(checkBox) {                     var frm = document.forms[0];                     var flag = false;                     var cnt = 0;                     for (var i = 0; i < document.forms[0].length; i++) {                         if (document.forms[0].elements[i].id.indexOf(checkBox) != -1) {                             if (document.forms[0].elements[i].checked) {                                 flag = true                                 cnt = cnt + 1;                             }                         }                     }                     if (flag == false) {                         alert('Atleast one check box should be  checked.')                         return false                     }

}

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