matchHeight=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 'fulllength'

		  if(/\bfulllength\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 fulllength <div> elements

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

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

	 }

}

// execute function when page loads