how to pass value from cfgrid multiple select

Could anyone help?

Javascript fixMe() work properly in IE but not work in Chrome.

Sample script

<SCRIPT language="JavaScript">

<!--

function showErrorMessage(form, ctrl, value, message){

  alert("The value " + value + " of the " + ctrl + " field " + message);

}

function initGrid() {

ColdFusion.Grid.getGridObject('printpayment_grid').getSelectionModel().singleSelect = false;

}

function fixMe() {

  obj = ColdFusion.Grid.getSelectedRows('printpayment_grid');

   var selected1 = "";

    for(var i=0; i<obj.length; i++) {

        if(selected1 == "") selected1 = obj.C_VENDOR_NAME_PR;

        else selected1 += "," + obj.C_VENDOR_NAME_PR;

    }

    document.getElementById('selected1').value = selected1;

    return true;

} 

\\-->

</SCRIPT>