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Firing jQuery on key press action

ApexCo asked
Last Modified: 2012-05-09
I'm trying to get this to fire using "onkeyup", here is my setup. My field is not getting set, not sure where my mistake is.

function setDirty(changeVal) {
                $('<%=dirtyField.ClientID %>').val(changeVal);

<asp:HiddenField ID="dirtyField" runat="Server" />

                //set attributes for dirty detection in data changes
                txtReason.Attributes.Add("onkeyup", "setDirty(true);");
                txtAWB.Attributes.Add("onkeyup", "setDirty(true);");
                txtERP.Attributes.Add("onkeyup", "setDirty(true);");
                ddlPriority.Attributes.Add("onclick", "setDirty(true);");
                ddlCarrier.Attributes.Add("onclick", "setDirty(true);");

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