title: Get a number for a style value WITHOUT the "px;" suffix
body: <p>I am trying to do some comparison logic about the positions of HTML elements. I have a system that I think should work, but there is a problem.</p>
  <p>In my code I compare the current left and top values of one absolutely positioned element to those of another (which may be moving) using inequality statements (<code>&gt;</code> and <code>&lt;</code>).  The problem is that the feedback I get form <code>document.getElementById(nameVar).style.left</code> is in the form of a string (e.g. <code>200px</code>) not a number (e.g. <code>200</code>), so the comparisons don't work.</p>
  <p>My question is, is there any way to turn the string into a number that I can manipulate the way I want to?  Either by using an altered address or by preforming some procedure with the feedback once I get it.</p>
  <p>Any help would be great.</p>