function IsInteger(sInteger)								// IsInteger()
{   var deccount = 0 ;
    var isInt = true;
    var inputStr;
    inputStr=sInteger.toString(); //in case sInteger is not a string
    for (var i = 0; i < inputStr.length; i++)
    {   var oneChar = inputStr.charAt(i);
        if (oneChar == ".")
        {	deccount = deccount + 1 ;
			if (deccount > 1) isInt = false ;
        }
        if ((oneChar < "0" || oneChar > "9") || oneChar == ".")
        {   isInt = false;
            i = inputStr.length;
        }
    }
    return isInt;
}

function IsNumeric(field)
{	var FieldValue=field.value ;
	if ((IsInteger(FieldValue)== false) || FieldValue == "") {
      alert('Please Enter Numeric Values Only');
      field.focus();
      field.select();
      return false;
  }
  return true ;
}

function CheckForm() {

if (document.selectionForm.howHigh.value=='') {
      alert('Please select the required height range');
      document.selectionForm.howHigh.focus();
      return false;
}

if (document.selectionForm.powerSource.value=='') {
      alert('Please select the required power source');
      document.selectionForm.powerSource.focus();
      return false;
}

if (document.selectionForm.selectedCategory.value=='') {
      alert('Please select the type of platform');
      document.selectionForm.selectedCategory.focus();
      return false;
}

return true;
}

function formHandler(form){
var URL = document.form.site.options[document.form.site.selectedIndex].value;
window.location.href = URL;
}