/* 
Allow two "div"s to have equal heigth, no matter how long or short their contents are.
*/


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();
	}


}