I created a page dynamically check below the example
label l=new label()
l.id="lbltest"
l.text+="<div id=name name=name runat=server><br />"
l.text+="<div id=age name=age runat=server><br />"
l.text+="<div id=gender name=gender runat=server><br />"

my question is as follows I want to assign values to name and age. How can that be done?

I have tried to do it using javascript
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document.getElementById("name").value="test"
but got an error NULL POINTER how can assign value to div after page load?Any suggestions???

Try

document.getElementById("name").innerHTML="test"

same result!! got null pointer I want any method doesn't have to be using javascript

feel free to post what you did to resolve the issue so that others can benefit from your experience.