strings in javascript stalling script

Im trying to output some database values into javascript. Its all going well but I have one awkward problem. I would like to enter a Customer name as one of the output values as well as their email address. Whenever I use the full customer name (called Full) the script fails. This name has spaces in it eg. "Simon Travis" However when I use the customer's username which never has spaces in it, the thing works fine. I suspect this is a function of the fact the the full customer name has spaces in it and the javascript is getting confused. Here is the relevant bit of code : Beneath it is the outputted javascript

Dim cstype As Type = Me.GetType()
        Dim i As Integer

        Dim popupscript As String
        Dim popupscript2 As String
        Try
            For Each dtrParent In ds.Tables("Table").Rows
                i = i + 1
                Try
                    Dim jfunction As String = "function onSmartWinEvent() {var words" & i & " = '<div ><b>" & dtrParent("USER") & "</b></div>'; marker" & i & ".openSmartWindow(words" & i & ");}"
                    Dim jcentre As String = "map.drawZoomAndCenter(myPoint1, 10);"
                    Dim jmarker As String = "var marker" & i & " = new YMarker(myPoint" & i & ");"
                    Dim jaddmarker As String = "marker" & i & ".addLabel('<blink><font color=white face=arial size=2>" & dtrParent("Full") & "</font></blink>');"
                    Dim jClickforMore = "var _txt = '<div style=width:160px;height:100px;><b>" & dtrParent("Email") & "<p><\p>" & dtrParent("Tel") & "<p><\p>" & "</b></div>'; marker" & i & ".addAutoExpand(_txt);"
                    Dim jcaptureevent As String = "YEvent.Capture(marker" & i & ", EventsList.MouseClick, onSmartWinEvent);"
                    'Dim joverlay As String = "map.addOverlay(marker" & i & ");"
                    dt2.Rows().Add(dtrParent("USER"), dtrParent("pcode"))
                    popupscript = jfunction
                    popupscript2 = jmarker & jaddmarker & jClickforMore & jcaptureevent
                    '& joverlay
                   
                Catch ex As Exception
                    Console.WriteLine(ex.Message)
                End Try

                For Each dtrChild In dtrParent.GetChildRows(dre)
                    Dim jmypoint As String = "var myPoint" & i & " = new YGeoPoint(" & dtrChild("latitude") & "," & dtrChild("longitude") & ");"
                    popupscript = popupscript & jmypoint & popupscript2
                    'MsgBox(popupscript)
                    'dt2.Rows().Add(dtrChild("longitude"))  
                Next
                Me.ClientScript.RegisterClientScriptBlock(Me.GetType, "PopUpCode" & i, popupscript, True)
            Next
        Catch ex As Exception
            Console.WriteLine(ex.Message)
        End Try



function onSmartWinEvent() {var words2 = '<div ><b>CRMEADMIN</b></div>'; marker2.openSmartWindow(words2);}var myPoint2 = new YGeoPoint(51.816,-0.351);var marker2 = new YMarker(myPoint2);marker2.addLabel('<blink><font color=white face=arial size=2>CR Medical</font></blink>');var _txt = '<div style=width:160px;height:100px;><b>colinread@btconnect.com<p><\p>01582 621 851<p><\p></b></div>'; marker2.addAutoExpand(_txt);YEvent.Capture(marker2, EventsList.MouseClick, onSmartWinEvent);