js set of validation functions_form effects

Copy code The code is as follows:

//Character processing;
//Remove left and right spaces;
function trim(s){
return rtrim(ltrim(s));
}
//Remove left space;
function ltrim(s){
return s.replace( /^s*/, "");
}
//Remove right space;
function rtrim(s){
return s.replace( /s*$/, "");
}
//Verification information;
//Empty character value;
function isEmpty(s){
s = trim(s);
return s.length == 0 ;
}
//Email;
function isEmail(s){
s = trim(s);
var p = /^[_.0-9a-z-] @ ([0-9a-z][0-9a-z-] .){1,4}[a-z]{2,3}$/i;
return p.test(s);
}
//Number;
function isNumber(s){
return !isNaN(s);
}
//Color value;
function isColor(s){
s = trim(s);
if (s.length !=7) return false;
return s.search(/#[a-fA-F0-9]{6}/) != -1 ;
}
//Mobile phone number;
function isMobile(s){
s = trim(s);
var p = /13d{9}/;
return p .test(s);
}
//ID card;
function isCard(s){
s = trim(s);
var p = /^d{15}( d{2}[xX0-9])?$/;
return p.test(s);
}
//URL;
function isURL(s){
s = trim(s).toLowerCase();
var p = /^http://[A-Za-z0-9] .[A-Za-z0-9] [/=?%-&_~`@ []': !]*([^<>""])*$/;
return p.test(s);
}
//Phone;
function isPhone( s){
s = trim(s);
var p = /^(((d{3}))|(d{3}-))?((0d{2,3})| 0d{2,3}-)?[1-9]d{6,7}$/;
return p.test(s);
}
//Zip;
function isZip (s){
s = trim(s);
var p = /^[1-9]d{5}$/;
return p.test(s);
}
//Double;
function isDouble(s){
s = trim(s);
var p = /^[- ]?d (.d )?$/;
return p.test(s);
}
//Integer;
function isInteger(s){
s = trim(s);
var p = /^[- ]?d $/;
return p.test(s);
}
//English;
function isEnglish(s){
s = trim(s);
var p = /^[A-Za-z] $/;
return p.test(s);
}
//Chinese;
function isChinese(s){
s = trim( s);
var p = /^[u0391-uFFE5] $/;
return p.test(s);
}
//Double byte
function isDoubleChar(s) {
var p = /^[^x00-xff] $/;
return p.test(s);
}
//Contains Chinese characters
function hasChineseChar(s){
var p = /[^x00-xff]/;
return p.test(s);
}
function hasAccountChar(s){
var p = /^[a- zA-Z0-9][a-zA-Z0-9_-]{0,15}$/;
return p.test(s);
}
function limitLen(s,Min,Max ){
s=trim(s);
if(s=="") return false;
if((s.lengthMax))
return false;
else
return true;
}