Student Planning Wizard

Wednesday, October 11, 2006

Student Planning Wizard

javascript trim function

Monday, October 09, 2006

function leftTrim(sString)
{
while (sString.substring(0,1) == ' ')
{
sString = sString.substring(1, sString.length);
}
return sString;
}



------------------------------------


function rightTrim(sString)
{
while (sString.substring(sString.length-1, sString.length) == ' ')
{
sString = sString.substring(0,sString.length-1);
}
return sString;
}


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The allTrim() JavaScript function combines both leftTrim() and rightTrim() functions:

function trimAll(sString)
{
while (sString.substring(0,1) == ' ')
{
sString = sString.substring(1, sString.length);
}
while (sString.substring(sString.length-1, sString.length) == ' ')
{
sString = sString.substring(0,sString.length-1);
}
return sString;

javascript string literal

var aVAR ='"\'<%context%>\'"'

for a literal string to be entered in use this example:

method(\"'+string+'\")

would produce: string

to insert a variable:
obj.setAttribute("onclick", "aFunction(" + i +")"

getting the application context in javascript

first you create a jsp page with the following content:
<%@page contentType="text/javascript"%>
var context ='"\'<%= request.getContextPath() %>\'"';

note: the context will have a string with the quotes still around it so these will need to be trimmed

then in the page or place javascript is included in your program include this file, for example:

script type="text/javascript" src="ContextPath.jsp" (surrounded by script tag)

the above context varialbe is now a global javascript variable

internet explorer fix for setting javascript dom button onlick method

setting the javascript dom button onlick method doesn't work in inter net explorer

the solution is to set the elements onclick to a function and carrry out the function
from the set function

for example

element.onclick = linkClick;

function linkClick(){

someFunction();
}