/*
	Utils Javascript
	KanWel!
	26-06-2008 i-Aspect B.V.
	door: Rutger Laurman

*/
   /* meeschalende textarea - van jroller.com */
   var ResizingTextArea = Class.create();

   ResizingTextArea.prototype = {
      defaultRows: 1,
      initialize: function(field){
         this.defaultRows = Math.max(field.rows, 1);
         this.resizeNeeded = this.resizeNeeded.bindAsEventListener(this);
         Event.observe(field, "click", this.resizeNeeded);
         Event.observe(field, "keyup", this.resizeNeeded);
      },
      resizeNeeded: function(event) {
         var t = Event.element(event);
         var lines = t.value.split('\n');
         var newRows = lines.length + 1;
         var oldRows = t.rows;
         for (var i = 0; i < lines.length; i++){
            var line = lines[i];
            if (line.length >= t.cols) newRows += Math.floor(line.length / t.cols);
         }
         if (newRows > t.rows) t.rows = newRows;
         if (newRows < t.rows) t.rows = Math.max(this.defaultRows, newRows);
      }
   }