javascript error : Access is denied

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ASP.NET

Javascript

Hello,

I have two frames in test.aspx page.

 <frameset rows="50%,*" bordercolor="#cc0000" scroll="no">
        <frame src="test.aspx" width="90%"  name="main" scroll="auto"></frame>
       <frame src="https://10.125.10.138/cms/test.aspx" width="90%"  name="main1" scroll="auto"></frame>
</frameset>

main frame contains local test.aspx
wheras main1 frame contains test.aspx from remote server

main frame page has a button,
main1 frame page has lable

when i click button, label should display "Hello"

------------------------------------

what i am doing is

on buttonClientClick calling javascript function

function main1()
{
    parent.main1.document.form1.lblAnswer.text ="Hello"    
}

but it gives error like "Access is denied"

how can i disply "Hello" on main1 frame page label when button on main frame page is clicked