Using greater than and less than in javascript

consider there are two 2 input  text types(text boxes) .say one  have 12.34 and other  12.43.

Now we need to compare two values and print alert if first number is greater than second.

here  fld_txt1 and fld_txt2 are the id's of the respective input types

    var iValue1=document.getElementById("fld_txt1").value;
    var  iValue2= document.getElementById("fld_txt2").value;

if( iValue1>iValue2)

alert('number is greater');

But unfortunately this code will not work for all the cases
The javascript  checks alwaysonly the numbers before "." ,so  in this case 12 & 12

The solution for this problem is


    var  iValue1= parseFloat(document.getElementById("fld_txt1").value);
    var  iValue2= parseFloat(document.getElementById("fld_txt2").value);

if( iValue1>iValue2)

alert('number is greater');

This code works like a charm ,the magic here is typecasting.