// 是否为空，非空返回真，不非为空返回假
function isBlank(str) { var blankFlag = true;
if (str.length == 0) return true;
for (var i = 0; i < str.length; i++) {
if ((str.charAt(i) != "") && (str.charAt(i) != " ")) {
blankFlag = false;
break;
}
}
return blankFlag;
}
function checkNotNull(theField, fieldName) {
if(isBlank(theField.value)){
alert(fieldName + "不可为空！");
if(theField.type!="hidden"){
theField.focus();
}
return false;
}
return true;
}
// 是否为数字
function checkNumber(theField, fieldName) {
var pattern = /^([0-9]|(-[0-9]))[0-9]*((\.[0-9]+)|([0-9]*))$/;
if(theField.value.trim() == "") return true;
if (!pattern.test(theField.value.trim())) {
alert(fieldName + "必须为合法数字");
theField.focus();
theField.select();
return false;
}
return true;
}
function isNumber(str) {
var pattern = /^([0-9]|(-[0-9]))[0-9]*((\.[0-9]+)|([0-9]*))$/;
if(str.trim() == "") return false;
if (!pattern.test(str.trim())) return false;
return true;
}
// 是否为指定范围数字
function checkNumberRange(theField, fieldName, min, max) {
if(theField.value.trim() == "") return true;
if (!checkNumber(theField, fieldName)) return false;
if ((min != "") && (theField.value.trim() < min)) {
alert(fieldName + "不可小于" + min + "！");
theField.focus();
theField.select();
return false;
}
if ((max != "") && (theField.value.trim() > max)) {
alert(fieldName + "不可超过" + max + "！");
theField.focus();
theField.select();
return false;
}
return true;
}
function isNumberRange(str, min, max) {
if(str == "") return false;
if (!isNumber(str)) return false;
if ((min != "") && (str < min)) {
return false;
}
if ((max != "") && (str > max)) {
return false;
}
return true;
}
// 是否为整数
function checkInteger(theField, fieldName) {
var pattern = /^(\d|(-\d))\d*$/;
if(theField.value.trim() == "") return true;
if (!pattern.test(theField.value.trim())) {
alert(fieldName + "必须为整数！");
theField.focus();
theField.select();
return false;
}
return true;
}
function isInteger(str) {
var pattern = /^(\d|(-\d))\d*$/;
if(str.trim() == "") return false;
if (!pattern.test(str.trim())) {
return false;
}
return true;
}
// 是否为指定范围内整数
function checkIntegerRange(theField, fieldName, min, max) {
if(theField.value.trim() == "") return true;
if (!checkInteger(theField, fieldName)) return false;
if ((min != "") && (theField.value.trim() < min)) {
alert(fieldName + "不可小于" + min + "！");
theField.focus();
theField.select();
return false;
}
if ((max != "") && (theField.value.trim() > max)) {
alert(fieldName + "不可超过" + max + "！");
theField.focus();
theField.select();
return false;
}
return true;
}
function isIntegerRange(str, min, max) {
if(str == "") return false;
if (!isInteger(str)) return false;
if ((min != "") && (str < min)) {
return false;
}
if ((max != "") && (str > max)) {
return false;
}
return true;
}
// 是否为正数
function checkPositiveNumber(theField, fieldName) {
if(theField.value == "") return true;
if (theField.value.charAt(0) == '-') {
alert(fieldName + "必须为正数！");
theField.focus();
return false;
}
return true;
}
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