var secs = 5;
var wait = secs * 1000;

function Update(num)
   {
                       if(num != secs)
                       {
                           printnr = (wait / 1000) - num;
                           document.licenseform.btnSubmit.value = "我同意 [" + printnr + "]";
                       }
}

function Timer()
   {
                       document.licenseform.btnSubmit.disabled = false;
                       document.licenseform.btnSubmit.value = " 我同意 ";
   }


function AgreeWait()
  {
        			document.licenseform.btnSubmit.value = "我同意 [" + secs + "]";
        			document.licenseform.btnSubmit.disabled = true;
        			for(I = 1; I <= secs; I++)
        			{
        				window.setTimeout("Update(" + I + ")", I * 1000);
        			}
        			window.setTimeout("Timer()", wait);
}