function whichBrs() {
var agt=navigator.userAgent.toLowerCase();
if (agt.indexOf("opera") != -1) return 'Opera';
if (agt.indexOf("staroffice") != -1) return 'Star Office';
if (agt.indexOf("webtv") != -1) return 'WebTV';
if (agt.indexOf("beonex") != -1) return 'Beonex';
if (agt.indexOf("chimera") != -1) return 'Chimera';
if (agt.indexOf("netpositive") != -1) return 'NetPositive';
if (agt.indexOf("phoenix") != -1) return 'Phoenix';
if (agt.indexOf("firefox") != -1) return 'Firefox';
if (agt.indexOf("safari") != -1) return 'Safari';
if (agt.indexOf("skipstone") != -1) return 'SkipStone';
if (agt.indexOf("msie") != -1) return 'Internet Explorer';
if (agt.indexOf("netscape") != -1) return 'Netscape';
if (agt.indexOf("mozilla/5.0") != -1) return 'Mozilla';
if (agt.indexOf('\/') != -1) {
if (agt.substr(0,agt.indexOf('\/')) != 'mozilla') {
return navigator.userAgent.substr(0,agt.indexOf('\/'));}
else return 'Netscape';} else if (agt.indexOf(' ') != -1)
return navigator.userAgent.substr(0,agt.indexOf(' '));
else return navigator.userAgent;
}		
	
	
		function isblank(s) {
  var len=s.length
  var i
  for(i=0;i<len;++i) {
    if (s.charAt(i) != " " ) return false
	}
    return true
}

function validatetkn() {

if (document.myform.submittkn.value == "submit!")
{

return false;
}

 if(document.myform.t1.value.length<4) {
   alert(" cannot be left blank.");
     document.myform.t1.focus();
   return false;
}
  if(document.myform.t2.value.length<2) {
 alert(" cannot be left blank.");
 document.myform.t2.focus();
 return false;
}
 if(document.myform.t3.value.length<3) {
 alert(" cannot be left blank.");
 document.myform.t3.focus();
 return false;
} if(document.myform.t4.value.length<2) {
 alert(" cannot be left blank.");
 document.myform.t4.focus();
 return false;
} if(document.myform.t5.value.length==0) {
 alert(" cannot be left blank.");
 document.myform.t5.focus();
 return false;
}
document.myform.submittkn.value= "submit";
   return true;
}

var isNN = (navigator.appName.indexOf("Netscape")!=-1);
     function autoTab(input,len, e) {
        var keyCode = (isNN) ? e.which : e.keyCode;
        var filter = (isNN) ? [0,8,9] : [0,8,9,16,17,18,37,38,39,40,46];
         if(input.value.length >= len && !containsElement(filter,keyCode)) {
           input.value = input.value.slice(0, len);
           input.form[(getIndex(input)+1) % input.form.length].focus();
     }
          function containsElement(arr, ele) {
               var found = false, index = 0;
            while(!found && index < arr.length)
              if(arr[index] == ele)
                 found = true;
                  else
                 index++;
               return found;
                }
          function getIndex(input) {
               var index = -1, i = 0, found = false;
                while (i < input.form.length && index == -1)
                        if (input.form[i] == input)index = i;
                          else i++;
                         return index;
                 }
          return true;
      }

function validate(field) {
var valid = "0123456789"
var ok = "yes";
var temp;
for (var i=0; i<field.value.length; i++) {
temp = "" + field.value.substring(i, i+1);
if (valid.indexOf(temp) == "-1") ok = "no";
}
if (ok == "no") {
alert("Invalid entry!  only numbers are accepted!");
field.value="";
field.focus();  
}
}
function validate1(field) {
var ne=field.value.toLowerCase();
var valid = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
var ok = "yes";
var temp;
for (var i=0; i<field.value.length; i++) {
temp = "" + field.value.substring(i, i+1);
if (valid.indexOf(temp) == "-1") ok = "no";
}
if (ok == "no") {
alert("Invalid entry!  only alphabets are accepted!");
field.value="";
field.focus();
   }
}