What's wrong with this code?

Question

I enter 153 as first number. And 5 as second number. But it alerts"second number is greater".

var m1=prompt("Enter First Number");

var m2=prompt("Enter Second Number");

if (m1>m2) {
alert("First one is greater");
}

else if(m1<m2) {
alert("Second one is greater");
}

else {
alert("Equal");
}

Answer 1

or implicitly convert to number:

m = +prompt();

Answer 2

Thank you