function isEmpty(stringContent) {
  if (!stringContent)
    return true;
  else
    return false;
} // end function isEmpty

function getStringLength(stringContent) {
  var StringContent = new String(stringContent);
  return StringContent.length;
} // end function checkStringLength

function validAlphanumeric(arg) {
    if (!arg) return false;
    var Chars = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_";

    for (var i = 0; i < arg.length; i++) {
       if (Chars.indexOf(arg.charAt(i)) == -1)
          return false;
    }
    return true;
}

function validNumeric(arg) {
    if (!arg) return false;
    var Chars = "+0123456789";

    for (var i = 0; i < arg.length; i++) {
       if (Chars.indexOf(arg.charAt(i)) == -1)
          return false;
    }
    return true;
}

function validMobile(arg) {
    if (!arg) return false;
    var Chars = "+0123456789";

    for (var i = 0; i < arg.length; i++) {
       if (Chars.indexOf(arg.charAt(i)) == -1)
          return false;
    }
    return true;
}

function changeCase(frmObj) {
var index;
var tmpStr;
var tmpChar;
var preString;
var postString;
var strlen;
tmpStr = frmObj.value.toLowerCase();
strLen = tmpStr.length;
if (strLen > 0)  {
	for (index = 0; index < strLen; index++)  {
		if (index == 0)  {
			tmpChar = tmpStr.substring(0,1).toUpperCase();
			postString = tmpStr.substring(1,strLen);
			tmpStr = tmpChar + postString;
		}
		else {
			tmpChar = tmpStr.substring(index, index+1);
			if (tmpChar == " " && index < (strLen-1))  {
				tmpChar = tmpStr.substring(index+1, index+2).toUpperCase();
				preString = tmpStr.substring(0, index+1);
				postString = tmpStr.substring(index+2,strLen);
				tmpStr = preString + tmpChar + postString;
			}
		}
	}
}
frmObj.value = tmpStr;
}

function replaceSubstring(inputString, fromString, toString) {
   // Goes through the inputString and replaces every occurrence of fromString with toString
   var temp = inputString;
   if (fromString == "") {
      return inputString;
   }
   if (toString.indexOf(fromString) == -1) { // If the string being replaced is not a part of the replacement string (normal situation)
      while (temp.indexOf(fromString) != -1) {
         var toTheLeft = temp.substring(0, temp.indexOf(fromString));
         var toTheRight = temp.substring(temp.indexOf(fromString)+fromString.length, temp.length);
         temp = toTheLeft + toString + toTheRight;
      }
   } else { // String being replaced is part of replacement string (like "+" being replaced with "++") - prevent an infinite loop
      var midStrings = new Array("~", "`", "_", "^", "#");
      var midStringLen = 1;
      var midString = "";
      // Find a string that doesn't exist in the inputString to be used
      // as an "inbetween" string
      while (midString == "") {
         for (var i=0; i < midStrings.length; i++) {
            var tempMidString = "";
            for (var j=0; j < midStringLen; j++) { tempMidString += midStrings[i]; }
            if (fromString.indexOf(tempMidString) == -1) {
               midString = tempMidString;
               i = midStrings.length + 1;
            }
         }
      } // Keep on going until we build an "inbetween" string that doesn't exist
      // Now go through and do two replaces - first, replace the "fromString" with the "inbetween" string
      while (temp.indexOf(fromString) != -1) {
         var toTheLeft = temp.substring(0, temp.indexOf(fromString));
         var toTheRight = temp.substring(temp.indexOf(fromString)+fromString.length, temp.length);
         temp = toTheLeft + midString + toTheRight;
      }
      // Next, replace the "inbetween" string with the "toString"
      while (temp.indexOf(midString) != -1) {
         var toTheLeft = temp.substring(0, temp.indexOf(midString));
         var toTheRight = temp.substring(temp.indexOf(midString)+midString.length, temp.length);
         temp = toTheLeft + toString + toTheRight;
      }
   } // Ends the check to see if the string being replaced is part of the replacement string or not
   return temp; // Send the updated string back to the user
} // Ends the "replaceSubstring" function

function trim(s) 
{
  // Remove leading spaces and carriage returns
  
  while ((s.substring(0,1) == ' ') || (s.substring(0,1) == '\n') || (s.substring(0,1) == '\r'))
  {
    s = s.substring(1,s.length);
  }

  // Remove trailing spaces and carriage returns

  while ((s.substring(s.length-1,s.length) == ' ') || (s.substring(s.length-1,s.length) == '\n') || (s.substring(s.length-1,s.length) == '\r'))
  {
    s = s.substring(0,s.length-1);
  }
  return s;
}