//displays alert if a message exits function showAlert(message) { if (!(message==null || message=="")) alert(message); } //trim and return a string function trim(str1) { start=0; end=0; if (str1=="") return str1; var str=new String(str1); for (var i = 0; i < str.length; i++) { if (str.charAt(i) != " ") { start = i; break;} } for (var i = str.length-1; i >=0; i--) { if (str.charAt(i) != " ") { end = i+1; break;} } return str.substring(start,end); } // checks if a field is empty function isEmpty(field,message) { if (isEmptyV(field.value,message)) { field.focus(); return true } else return false; } // checks if a value is empty function isEmptyV(value,message) { value=trim(value); if (value==null || value=="") { showAlert(message); return true; } return false; } // checks if a field contains a number function isNumber(field,message) { value=trim(field.value); if (!isNumberV(value,message)) { field.focus(); return false } else return true; } // checks if a value is a number function isNumberV(value,message) { value=trim(value); oneDecimal = false inputStr = value.toString() for (var i = 0; i < inputStr.length; i++) { var oneChar = inputStr.charAt(i); if (i == 0 && oneChar == "-") { continue; } if (oneChar == "." && !oneDecimal) { oneDecimal = true; continue; } if (oneChar < "0" || oneChar > "9") { showAlert(message); return false; } } return true } // checks if a field contains a positive number function isPosNumber(field,message) { value=trim(field.value); if (!isPosNumberV(value,message)) { field.focus(); return false } else return true; } // checks if a value is a positive number function isPosNumberV(value,message) { value=trim(value); oneDecimal = false inputStr = value.toString() for (var i = 0; i < inputStr.length; i++) { var oneChar = inputStr.charAt(i); if (oneChar == "." && !oneDecimal) { oneDecimal = true; continue; } if (oneChar < "0" || oneChar > "9") { showAlert(message); return false; } } return true } // checks if a field is an integer function isInteger(field,message) { value=trim(field.value); if (!isIntegerV(value,message)) { field.focus(); return false } else return true; } // checks if a value is an integer function isIntegerV(value,message) { value=trim(value); inputStr = value.toString() for (var i = 0; i < inputStr.length; i++) { var oneChar = inputStr.charAt(i) if (i == 0 && oneChar == "-") { continue } if (oneChar < "0" || oneChar > "9") { showAlert(message); return false } } return true } // checks if a field is a positive integer function isPosInteger(field,message) { value=trim(field.value); if (!isPosIntegerV(value,message)) { field.focus(); return false; } else return true; } // checks if a value is a positive integer function isPosIntegerV(value,message) { value=trim(value); inputStr = value.toString() for (var i = 0; i < inputStr.length; i++) { var oneChar = inputStr.charAt(i) if (oneChar < "0" || oneChar > "9") { showAlert(message); return false } } return true } // checks if a field is between two integers function isBetweenInts(field,first,second,message) { value=trim(field.value); if (!isBetweenIntsV(value,first,second,message)) { field.focus(); return false } else return true; } // checks if a value is between two integers function isBetweenIntsV(value,first,second,message) { value=trim(value); if (!isIntegerV(value,message)) return false; num=parseInt(value,10); if (isNaN(num)) { showAlert(message); return false;} if (numsecond) { showAlert(message); return false;} return true; } // checks if a field is between two numbers function isBetweenNums(field,first,second,message) { value=trim(field.value); if (!isBetweenNumsV(value,first,second,message)) { field.focus(); return false } else return true; } // checks if a value is between two numbers function isBetweenNumsV(value,first,second,message) { value=trim(value); if (!isNumberV(value,message)) return false; num=parseFloat(value,10); if (isNaN(num)) { showAlert(message); return false;} if (numsecond) { showAlert(message); return false;} return true; } // checks if a field is a date function isDate(field,message) { value=trim(field.value); if (!isDateV(value,message)) { field.focus(); return false } else return true; } // checks if a value is a date function isDateV(value,message) { value=trim(value); if (value.indexOf("/") != -1) separator="/"; else if (value.indexOf("-") != -1) separator="-"; else { showAlert(message); return false;} var myarray = value.split(separator,3); if (!(isBetweenIntsV(myarray[0],1,12,message))) return false; if (!(isBetweenIntsV(myarray[1],1,31,message))) return false; if (!(isPosIntegerV(myarray[2],message))) return false; dat = Date.parse(value); if (isNaN(dat)) { showAlert(message); return false;} return true; } // checks if a value is zipcode function isZip(field,str) { value = trim(field.value); if (!isZipV(value,str)) { field.focus(); return false; } else return true; } function isZipV(value,message) { if (value.length == 5) { if (!isPosIntegerV(value)) { showAlert(message); return false; } } else if (value.length == 10) { if (!isPosIntegerV(value.substr(0,5))) { showAlert(message); return false; } if (!isPosIntegerV(value.substr(6,10))) { showAlert(message); return false; } } else { showAlert(message); return false; } return true; } //check if a value is email function isEmail(field,str) { value = trim(field.value); if (!isEmailV(value,str)) { field.focus(); return false; } else return true; } function isEmailV(value,message) { invalidChars = " /:,;"; for (i=0; i -1) { showAlert(message); return false; } } atPos = value.indexOf("@",1); if (atPos == -1) { showAlert(message); return false; } if (value.indexOf("@",atPos+1) > -1) { showAlert(message); return false; } periodPos = value.indexOf(".",atPos+2); if (periodPos == -1) { showAlert(message); return false; } if (periodPos+3 > value.length) { showAlert(message); return false; } return true } //check for length function isLength(field,message,length) { value = trim(field.value); if (!isLengthV(value,message,length)) { field.focus(); return false; } else return true; } function isLengthV(value,message,length1) { value=trim(value); if (value.length !=length1) { showAlert(message); return false; } return true; }