Save the following code as Common.js
Class Library Features:
1.Trim (str)--Remove the spaces on either side of the string
2.XMLEncode (str)--XML encoding of strings
3.ShowLabel (STR,STR)--Mouse prompt function (display character, prompt character)
You can set the font, color, size, and hint background color, border, and so on for the text displayed
4.IsEmpty (obj)--Verifying that the input box is empty
5.IsInt (Objstr,sign,zero)--verifies if it is an integer, a positive integer, a negative integer, and whether it includes 0
6.IsFloat (Objstr,sign,zero)--Verify that the floating-point number, positive floating-point, negative floating-point, and whether to include 0
7.IsEnLetter (objstr,size)--Verify if 26 letters, small capitalization
The source code is as follows:
/*
Name: Common.js
Function: Generic JavaScript script function library
Including:
1.Trim (str)--Remove the spaces on either side of the string
2.XMLEncode (str)--XML encoding of strings
3.ShowLabel (STR,STR)--Mouse prompt function (display character, prompt character)
4.IsEmpty (obj)--Verifying that the input box is empty
5.IsInt (Objstr,sign,zero)--Verifying whether an integer
6.IsFloat (Objstr,sign,zero)--Verify that it is a floating-point number
7.IsEnLetter (objstr,size)--Verify that it is 26 letters
*/
/*
==================================================================
String manipulation
Trim (String): Remove spaces on both sides of a string
==================================================================
*/
/*
==================================================================
LTrim (String): Removing space on the left
==================================================================
*/
function LTrim (str)
{
var whitespace = new String ("\t\n\r");
var s = new String (str);
if (Whitespace.indexof (S.charat (0))!=-1)
{
var j=0, i = s.length;
while (J < i && Whitespace.indexof (S.charat (j))!=-1)
{
j + +;
}
s = s.substring (j, I);
}
return s;
}
/*
==================================================================
RTrim (String): Remove the space on the right
==================================================================
*/
function RTrim (str)
{
var whitespace = new String ("\t\n\r");
var s = new String (str);
if (Whitespace.indexof (S.charat (s.length-1))!=-1)
{
var i = s.length-1;
while (i >= 0 && whitespace.indexof (s.charat (i))!=-1)
{
i--;
}
s = s.substring (0, i+1);
}
return s;
}
/*
==================================================================
Trim (String): Remove before and after spaces
==================================================================
*/
function Trim (str)
{
Return RTrim (LTrim (str));
}
/*
======================================================================
Xmlencode (String): XML Encoding of strings
======================================================================
*/
function Xmlencode (str)
{
Str=trim (str);
Str=str.replace ("&", "&");
Str=str.replace ("<", "");
Str=str.replace ("'", "" ");
Str=str.replace ("\" "," "");
return str;
}
/*
================================================================================
Validating class functions
================================================================================
*/
function IsEmpty (obj)
{
Obj=document.getelementsbyname (obj). Item (0);
if (Trim (obj.value) = "")
{
Alert ("field cannot be empty.) ");
if (Obj.disabled==false && obj.readonly==false)
{
Obj.focus ();
}
}
}
/*
Isint (string,string,int or string) test string, + or-or empty,empty or 0)
Function: To determine whether an integer, positive integer, negative integer, positive integer +0, negative integer +0
*/
function Isint (Objstr,sign,zero)
{
var reg;
var Bolzero;
if (Trim (OBJSTR) = "")
{
return false;
}
Else
{
Objstr=objstr.tostring ();
}
if ((sign==null) | | (Trim (sign) = ""))
{
Sign= "+-";
}
if ((zero==null) | | (Trim (zero) = "")
{
Bolzero=false;
}
Else
{
Zero=zero.tostring ();
if (zero== "0")
{
Bolzero=true;
}
Else
{
Alert ("Check for 0 parameters, only (empty, 0)");
}
}
Switch (sign)
{
Case "+-":
Integer
reg=/(^-?| ^\+?) \d+$/;
Break
Case "+":
if (!bolzero)
{
Positive integer
Reg=/^\+? [0-9]*[1-9][0-9]*$/;
}
Else
{
Positive integer +0
reg=/^\+?\d+$/;
Reg=/^\+? [0-9]*[0-9][0-9]*$/;
}
Break
Case "-":
if (!bolzero)
{
Negative integer
reg=/^-[0-9]*[1-9][0-9]*$/;
}
Else
{
Negative integer +0
reg=/^-\d+$/;
reg=/^-[0-9]*[0-9][0-9]*$/;
}
Break
Default
Alert ("Check symbol parameters, only (empty, +,-)");
return false;
Break
}
var r=objstr.match (REG);
if (r==null)
{
return false;
}
Else
{
return true;
}
}
/*
Isfloat (string,string,int or string) test string, + or-or empty,empty or 0)
Function: To determine whether it is floating point number, positive floating-point number, negative floating-point number, positive floating-point number +0, negative float +0
*/
function Isfloat (Objstr,sign,zero)
{
var reg;
var Bolzero;
if (Trim (OBJSTR) = "")
{
return false;
}
Else
{
Objstr=objstr.tostring ();
}
if ((sign==null) | | (Trim (sign) = ""))
{
Sign= "+-";
}
if ((zero==null) | | (Trim (zero) = "")
{
Bolzero=false;
}
Else
{
Zero=zero.tostring ();
if (zero== "0")
{
Bolzero=true;
}
Else
{
Alert ("Check for 0 parameters, only (empty, 0)");
}
}
Switch (sign)
{
Case "+-":
Floating point numbers
reg=/^ ((-?| \+?) \d+) (\.\d+) $/;
Break
Case "+":
if (!bolzero)
{
Positive floating-point numbers
Reg=/^\+? ([0-9]+\. [0-9]*[1-9][0-9]*) | ([0-9]*[1-9][0-9]*\. [0-9]+) | ([0-9]*[1-9][0-9]*)] $/;
}
Else
{
Positive floating-point number +0
Reg=/^\+?\d+ (\.\d+) $/;
}
Break
Case "-":
if (!bolzero)
{
Negative floating-point numbers
reg=/^-([0-9]+\.[ 0-9]*[1-9][0-9]*) | ([0-9]*[1-9][0-9]*\. [0-9]+) | ([0-9]*[1-9][0-9]*)] $/;
}
Else
{
Negative floating-point number +0
reg=/^ (-\d+ (\.\d+)?) | (0+ (\.0+)) $/;
}
Break
Default
Alert ("Check symbol parameters, only (empty, +,-)");
return false;
Break
}
var r=objstr.match (REG);
if (r==null)
{
return false;
}
Else
{
return true;
}
}
/*
Isenletter (string,string): test string, Case (ul,u,l or ul,u,l)
*/
function Isenletter (objstr,size)
{
var reg;
if (Trim (OBJSTR) = "")
{
return false;
}
Else
{
Objstr=objstr.tostring ();
}
if ((size==null) | | (Trim (size) = = "")
{
Size= "UL";
}
Else
{
Size=size.touppercase ();
}
switch (size)
{
Case "UL":
Case
reg=/^[a-za-z]+$/;
Break
Case "U":
Capital
reg=/^[a-z]+$/;
Break
Case "L":
Lowercase
reg=/^[a-z]+$/;
Break
Default
Alert ("Check the case parameters, only (empty, UL, U, L)");
return false;
Break
}
var r=objstr.match (REG);
if (r==null)
{
return false;
}
Else
{
return true;
}
}
/*
=====================================================================
Features: Small mouse tips
Author: Shenwan
Date: 2004/04/15
======================================================================
*/
Defining variables, setting default values
var labelfontface= "song Body, Arial,verdana";
var labelfontcolor= "#000000";
var labelfontsize= "9pt";
var labelfontstyle= "Font.plain";
var labelbordercolor= "#000000";
var labelbackcolor= "#FFFFE1";
Set individual properties
function Setlabelfontface (obj)
{
Obj=trim (obj);
if (Obj==null | | obj== "")
{
Obj= "Song Body, Arial,verdana";
}
Labelfontface=obj;
}
function Setlabelfontcolor (obj)
{
Obj=trim (obj);
if (Obj==null | | obj== "")
{
Obj= "#000000";
}
Labelfontcolor=obj;
}
function Setlabelfontsize (obj)
{
Obj=trim (obj);
if (Obj==null | | obj== "")
{
Obj= "9pt";
}
Labelfontsize=obj;
}
function Setlabelfontstyle (obj)
{
Obj=trim (obj);
if (Obj==null | | obj== "")
{
Obj= "Font.plain";
}
Labelfontstyle=obj;
}
function Setlabelbordercolor (obj)
{
Obj=trim (obj);
if (Obj==null | | obj== "")
{
Obj= "#000000";
}
Labelbordercolor=obj;
}
function Setlabelbackcolor (obj)
{
Obj=trim (obj);
if (Obj==null | | obj== "")
{
Obj= "#FFFFE1";
}
Labelbackcolor=obj;
}
Synthetic text styles
function Settextstyle (str)
{
var strret= "";
var strstyle= "";
Strstyle= "font-family:" +labelfontface+ ";";
strstyle+= "COLOR:" +labelfontcolor+ ";"
strstyle+= "font-size:" +labelfontsize+ ";";
Switch (Labelfontstyle.tolowercase ())
{
Case "Font.plain":
strstyle+= "Font-weight:normal;";
strstyle+= "Font-style:normal;";
Break
Case "Font.Bold":
strstyle+= "Font-weight:bold;";
strstyle+= "Font-style:normal;";
Break
Case "Font.Italic":
strstyle+= "Font-weight:normal;";
strstyle+= "font-style:italic;";
Break
Case "Font.italicbold":
Case "Font.bolditalic":
strstyle+= "Font-weight:bold;";
strstyle+= "font-style:italic;";
Break
Default
strstyle+= "Font-weight:bold;";
strstyle+= "font-style:italic;";
Break
}
strret= "<font style= '" +strstyle+ "' >";
strret+= "" +str+ "";
strret+= "</font>";
return strret;
}
Synthetic Table Styles
function Settablestyle ()
{
var strret= "";
strret+= "Border-right:" +labelbordercolor+ "1px solid;";
strret+= "Border-top:" +labelbordercolor+ "1px solid;";
strret+= "Border-left:" +labelbordercolor+ "1px solid;";
strret+= "Border-bottom:" +labelbordercolor+ "1px solid;";
strret+= "Background-color:" +labelbackcolor;
return strret;
}
Show Tips
function Shownote (str)
{
var strhtml;
Strhtml= "";
strhtml+= "<table height=1px width=1px border= ' 0 ' cellspacing= ' 0 ' cellpadding= ' 0 ' style= '" "+ settablestyle () +" ' > " ;
strhtml+= "<tr>";
strhtml+= "<td>" +settextstyle (str) + "</td>";
strhtml+= "</tr>";
strhtml+= "</table>";
if (document.all&&document.readystate== "complete")
{
document.all.div_note.innerhtml=strhtml;
Document.all.div_note.style.pixelleft=event.clientx+document.body.scrollleft+10
Document.all.div_note.style.pixeltop=event.clienty+document.body.scrolltop+10
document.all.div_note.style.visibility= "Visible"
}
}
Hide Hints
function Hidenote ()
{
if (document.all)
{
Document.all.div_note.style.visibility= "hidden";
}
Else
{
if (document.layers)
{
Clearinterval (Currentscroll)
Document.div_note.visibility= "hidden";
}
}
}
Class
function Init ()
{
Window.document.write ("<div id=\" div_note\ "style=\" Visibility:hidden; Position:absolute; Height:13px;z-index:1\ "></div>");
}
Init ();
Generate prompt characters
function ShowLabel (Text,note,bclick)
{
if (bclick!=null)
{
Return "<a href=\" #\ "onmouseover=\" Shownote (' "+ Note +") \ onmouseout=\ "Hidenote () \" Onclick=\ " Javascriptosomething (this); \ ">" + text + "</a>";
}
Else
{
Return "<a href=\" #\ "onmouseover=\" Shownote (' "+" + ") \" Onmouseout=\ "hidenote () \" > "+ text +" </a> ";
}
}
Test page:
Copy Code code as follows:
<HTML>
<HEAD>
<title>common javascript</title>
<script language= "javascript" src= "./common.js" ></script>
<script language= "JavaScript" >
function Checkint ()
{
Iptresult.value=isint (Ipttest.value,iptsign.value,iptzero.value);
}
function Checkfloat ()
{
Iptresult.value=isfloat (Ipttest.value,iptsign.value,iptzero.value);
}
function Checkletter ()
{
Iptresult.value=isenletter (Ipttest.value,iptsign.value);
}
document.write (ShowLabel ("TEST", "Only a testing!"));
document.write ("<br>");
</script>
<meta http-equiv= "Expires" content= "0" >
</HEAD>
<body>
<input type=text value= "" id= "Ipttest" ><input "Type=button value=" IsEmpty "onclick=" IsEmpty (' iptTest '); " >
<input Type=button value= "Checkint" onclick= "Checkint ()" >
<br>
<input type=text value= "id=" iptsign "name=" iptsign "><input Type=button value=" CheckFloat "onclick=" Checkfloat () ">
<br>
<input type=text value= "id=" Iptzero "name=" Iptzero "><input Type=button value=" CheckLetter "onclick=" Checkletter () ">
<br>
<input type=text value= "" Id=iptresult disabled=true>
</body>
</HTML>
