Help Adjusting Space based on Shape Height

Hello,

I currently have a script that will adjust the spacing between shapes based on the size of the shape. 

If the shapes are smaller than 0.2" in height or larger than 0.5" in height, I want the shapes NOT to move,  but an alert to come up instead, referencing the size is out of Production Standards. 
Could anyone please take a look at what I have and help me?
Thank you!

// instructions: select path items
var space = .0235 * 72;  //  minimum space between paths (inches)
var doc = app.activeDocument;
var sel = doc.selection.height;
var maxHeight = 0;
// Capture Height
for (var i = 0; i < app.selection.length; i++) {
    var _item = app.selection[i];
    if (_item.height > maxHeight) {
        var maxHeight = _item.height;
    };
}
  var shpHeight = (maxHeight / 72)*.9525;
function alignObj0(tabs,space) {
  var esp;
  // Max Height If Statement Specs
    if (shpHeight <= 0.2){
        var maxOverlap = 0
        var nestOverlap = 0
        alert("Size is Outside of Production Standards");
    }if (shpHeight > 0.2 && shpHeight <= 0.25){
        var maxOverlap = -2.54
        var nestOverlap = -0.85
        // alert("Small");
    }if (shpHeight > 0.25 && shpHeight <= 0.35){
        var maxOverlap = -4.74
        var nestOverlap = -1.22
        //alert("Medium");
    }if (shpHeight > 0.35 && shpHeight <= 0.45){
        var maxOverlap = -6.42
        var nestOverlap = -1.82
        //alert("Large"); 
    }if (shpHeight > 0.45 && shpHeight <= 0.5){
        var maxOverlap = -8.16
        var nestOverlap = -2.47
        //alert("X Large"); 
    }if (shpHeight > 0.5){
        var maxOverlap = 0
        var nestOverlap = 0
        alert("Size is Outside of Production Standards");
    };
        tabs.sort(function (a, b) {return a.left - b.left});
      for (var i = 1; i < tabs.length; i++) {
        // Really Tight Spacing
        esp = tabs[i].left-tabs[i-1].left-tabs[i-1].width;   //alert(esp);
          if (esp < maxOverlap) {
              for (var j = i; j < tabs.length; j++) {
                tabs[j].left += (esp*(-1))+space;
              }
        // Natural Nested Spacing
          } if (esp > maxOverlap && esp <= nestOverlap) {
              for (var j = i; j < tabs.length; j++) {
                tabs[j].left += 0
              }
        // Needs Spacing Situation 1
          } if (esp > nestOverlap && esp <= 0) {
              for (var j = i; j < tabs.length; j++) {   
                tabs[j].left += space-((esp/5)*4)
              }
        // Needs Spacing Situation 2
          } if (esp > 0 && esp <= space) {
              for (var j = i; j < tabs.length; j++) {   
                tabs[j].left += space-((esp/5)*4)
              }
        // Spacing is Good as is
          } if (esp > space) {
              for (var j = i; j < tabs.length; j++) {   
                tabs[j].left += (space * 0)
              }
          }
      }
};
  if (selection.length) {alignObj0(selection,space);};

Thank you!