Date Comparison in JavaScript

Date Comparison in JavaScript

I want to compare date in javascript with time I have used below code for
comparison
var pfrmdt = Date.parse(frmdt);
var ptodt = Date.parse(todt);
alert(pfrmdt)
alert(ptodt)
if(pfrmdt <= ptodt)
{
return true;
}
else{
alert(msg);
focusCtrl.value="";
focusCtrl.focus();
}
but its comparing with date only not with time