function checkNull(objText) {
  var vForm = document.frmGroupRequest; 
  var xLen = eval(vForm.name+"."+objText.name).value.length; 
  var s = eval(vForm.name+"."+objText.name).value;

  if(xLen>0){
    if(s.charAt(0)==" "){
      while(s.charAt(0)==" "&&s.length>=1){
        s=s.substring(1);
        if(s.length==0){
          eval(vForm.name+"."+objText.name).value="";
        }
      }
      xLen = s.length;
    }
    
    if(s.charAt((xLen-1))==" "){
      while(s.charAt((xLen-1))==" "){
        s=s.substring(0,(xLen-1)); 
        xLen = s.length;
      }
    }
    
    eval(vForm.name+"."+objText.name).value=s;
  }
}

function validatePhone(objText){
  var validChar="0123456789-()."; 
  var myLen = objText.value.length; 
  var mathOK = false;

  if (myLen < 1) { 
    objText.value = ""; 
  } else { 
    for (var i=0; i < myLen; i++ ){ 
      if(validChar.indexOf(objText.value.charAt(i))<0){ 
        objText.value="";
        objText.focus();
      } 
    } 
  }
}

function validateTextChars(objText){
  var validChar="qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM@.,;!?()1234567890_ ";
  var validAccent="ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÑÒÓÔÕÖÙÚÛÜÝàáâãäåæçèéêëìíîïñòóôõöùúûüýÿ"
  validChar = validChar+validAccent
  var myLen = objText.value.length; 
  var mathOK = false;

  if (myLen < 1) { 
    objText.value = ""; 
  } else { 
    for (var i=0; i < myLen; i++ ){ 
      if(validChar.indexOf(objText.value.charAt(i))<0){ 
        objText.value="";
        objText.focus();
      } 
    } 
  }
  chopSpaces(objText);
}

function chopSpaces(objTextT){
  var vForm = document.frmGroupRequest; 
  var s = eval(vForm.name+"."+objTextT.name).value;
  var xLen = s.length; 
  
  for(i = 0; i < xLen; i++){
    if(s.charAt(0)==" "){ 
      s = s.substring(1,s.length) 
    }
    if(s.charAt(s.indexOf(" ")+1) == " "){ 
      s = s.replace(s.charAt(s.indexOf(" ")+1),"")
    }
    if(s.charAt(s.length-1)==" "){
      s = s.substring(0,s.lastIndexOf(" ")) 
    } 
  }
  eval(vForm.name+"."+objTextT.name).value=s;
}

// validation of required information
function validate(){
  var vForm = document.frmGroupRequest;
  var sObj = eval(vForm.name+".txt1").value; if (sObj == ""){ document.frmGroupRequest.txt1.focus(); return false; }
  sObj = eval(vForm.name+".txt2").value; if (sObj == ""){ document.frmGroupRequest.txt2.focus(); return false; }
  sObj = eval(vForm.name+".txt3").value; if (sObj == ""){ document.frmGroupRequest.txt3.focus(); return false; }
  sObj = eval(vForm.name+".txt4").value; if (sObj == ""){ document.frmGroupRequest.txt4.focus(); return false; }
  sObj = eval(vForm.name+".txt5a").value; if (sObj == ""){ document.frmGroupRequest.txt5a.focus(); return false; }
  
}

function clearAir(){
  document.getElementById('air_t1').style.display = 'none';
}

function showAir(){
  document.getElementById('air_t1').style.display = 'block';
}