var SearchArr = new Array('699','1699','2699','4499','5899','6999','7699','10399','10999','14299','17999','35999','55399','77999','89999','109999');
var ImageArr = new Array('rechner_0.jpg','rechner_1.jpg','rechner_2.jpg','rechner_3.jpg','rechner_4.jpg','rechner_5.jpg','rechner_6.jpg','rechner_7.jpg','rechner_8.jpg','rechner_9.jpg','rechner_10.jpg','rechner_11.jpg','rechner_12.jpg','rechner_13.jpg','rechner_14.jpg','rechner_15.jpg','rechner_16.jpg');
function calc(source){var value = IsNumeric(source.value);source.value = value;var multi = 200;value = value*multi;var i=0;for(i;i<SearchArr.length;i++)if(value <= SearchArr[i]){changeImg(ImageArr[i]);return true;}if(i == SearchArr.length && value > SearchArr[i-1]){changeImg(ImageArr[i]);return true;}return false;}function changeImg(img){document.getElementById('calc_img').src = 'images/calculator/'+img;}

function IsNumeric(number)
{
   var valids = "0123456789.,";
   var right=true;
   var char;
   var point;
   for (i = 0; i < number.length ; i++)
   {
      char = number.charAt(i);
      if (char && valids.indexOf(char) == -1)
      {
		number = number.replace(char,'');
		i--;
	  }
	  if(char == ',' || char == '.')
		if(point == true)
			number = number.replace(char,'');
		else
			point = true;
    }
   	return number.replace(',','.');
}