validate single checkbox

Hello expert,

I have one checkbox which is I agree.  I want to user to check I agree check box and then submit.  If the box is not check then an alert popup tell (you must accept agreement in order to submit application) thanks for yours help
princeofemAsked:
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justinbilligConnect With a Mentor Commented:
function SubmitApplication( )
{
if( formname.checkboxname.checked == true )
{
    formname.submit( );
}
else
{
    alert( "You must agree to submit the application." );
}
}


change your submit button type from submit to button and put that function in the onclick event .... or you could do this


function SubmitApplication( )
{
if( document.getElementById( "idofCheckbox" ).checked == true )
{
    formname.submit( );
}
else
{
    alert( "You must agree to submit the application." );
}
}


the first one works but sometimes browsers get funny and accessesing an elemeny by its id is supported by all browsers
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princeofemAuthor Commented:
function isIAgreement() {
if (document.form1.IAgreement.value == "") {
alert ("\n Please select tax preparer agreement")
document.form1.IAgreement.focus();
return false;
}
return true;
}

this is what i have...Can i modify to work with checkbox? thanks
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princeofemAuthor Commented:
Opp I have changed value to checked and it works :-) thanks
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