matchColumns=function(){ 
	var divs,contDivs,maxHeight,divHeight,d; 

	//get all <div> elements in the document
	divs=document.getElementsByTagName('div'); 
	contDivs=[]; 

	//initialize maximum height value
	maxHeight=0; 

	//iterate over all <div> elements in the document
	for(var i=0;i<divs.length;i++) { 
		//make collection with <div> elements with class attribute 'container'
   	if(/\bcolumn\b/.test(divs[i].className)) { 
			d=divs[i]; 
			contDivs[contDivs.length]=d; 
			//determine height for <div> 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 <div> 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();			 
	} 
}