Append values into an existing anchor href

Question

I have captured 3 values from a datalist template using JavaScript, now I need to append these values into an existing anchor which is:

<a id="link" href='nextpage.aspx?id=<%#Eval("PlateId")%>&pp= #Eval("price")%>'>

I found the way to get the anchor href from JavaScript:

<script language='javascript' type="text/javascript" >
    function addLink() { 
        var anchor = document.getElementById("link"); 
        anchor.href = anchor + "&qty=";} 
</script>

But, I can't add the js value after "&qty=", I have tried adding the value like this:

anchor.href = anchor +"&qty=+Value+"

And with this:

anchor.href = anchor +"&qty='Value' "

I can't put it out of the quotation marks, because it won't display in the anchor.

Answer 1

anchor.href = anchor + "&qty="

should be

anchor.href = anchor.href + "&qty="

...otherwise you are trying to turn the link element into a string!

Meanwhile, you still need to keep Value out of the quotation marks, otherwise the final text generated will always be exactly that text: Value. If Value is a variable and is not returning the value you expect (an empty or undefined value, for example), then you need to look at the code that declares it and change that.