/*
Derived from a script by Alejandro Gervasio.
Modified to work in FireFox by Stefan Mischook for Killersites.com

Modified to work with multiple class groups also with elements with multiple class names
by Jonathan del Mar (dec-14-2006)

How it works: just apply the CSS class of ‘column’ to your pages’ main columns.

to work with different classes
add

by Jonathan del Mar

by default the script will call
matchColumns();
and the default class_name is ‘column’
(see the bottom of this script)
by Jonathan del Mar

*/

matchColumns=function(my_class){

var divs,contDivs,maxHeight,divHeight,d;

// get all elements in the document
divs=document.getElementsByTagName('div');

contDivs=[];

// initialize maximum height value
maxHeight=0;
if (!my_class) {
my_class = 'column';
}

my_regex = new RegExp('(.* |^)' + my_class + '( .*|$)');

// iterate over all elements in the document
for(var i=0;i<divs.length;i++){

// make collection with elements with class attribute ‘container’
//if(/\bcolumn\b/.test(divs[i].className)){
// modified by Jonathan del Mar to match ‘column’ in multiple classes

if(my_regex.test(divs[i].className)){
d=divs[i];

contDivs[contDivs.length]=d;

// determine height for element
if(d.offsetHeight){

divHeight=d.offsetHeight;

}

else if(d.style.pixelHeight){

divHeight=d.style.pixelHeight;

}

// calculate maximum height

maxHeight=Math.max(maxHeight,divHeight);



}

}

// assign maximum height value to all of container elements
for(var i=0;i<contDivs.length;i++){

contDivs[i].style.height=maxHeight + "px";
}
}

// Runs the script when page loads

window.onload=function(){

if(document.getElementsByTagName){

matchColumns();

var columns = new Array('column1', 'column2');

if (columns) {
for(var i=0;i<columns.length;i++){

matchColumns(columns[i]);

}
}
}

}