// Random (water)images on homepage
var pathToImages = '/design/waste/images/top/'
var images = new Array( 'alluminium_recycling.jpg', 'collection_trucks.jpg', 'collection_vehicle.jpg', 'collection_vehicle2.jpg', 'collection_vehicle3.jpg', 'collection_vehicle4.jpg', 'collection_vehicle5.jpg', 'compost_drum.jpg', 'compost_sieve.jpg', 'glass.jpg', 'glass_recycled.jpg', 'hazardous_waste.jpg', 'household_collection.jpg', 'metal.jpg', 'occupational_health.jpg', 'paper_waste.jpg', 'paper_waste_2.jpg', 'pet.jpg', 'pit_latrine_emptying.jpg', 'plastic.jpg', 'plastic_moulding.jpg', 'plastic_recycling.jpg', 'plastic2.jpg', 'plastic3.jpg', 'plastic4.jpg', 'rubber.jpg', 'seperated_collection.jpg', 'seperation_at_source.jpg', 'seperation_at_source2.jpg', 'seperation_at_source3.jpg', 'sorting_plastic.jpg', 'streetsweepers.jpg', 'sweepings.jpg', 'transfer.jpg', 'waste_collection.jpg', 'waste_picking.jpg', 'waste_picking_2.jpg', 'waste_picking_3.jpg', 'waste_picking_4.jpg' )
var numberOfRandomImages = images.length;

function writeRandomImages(){
	img=images[(Math.floor(Math.random()*numberOfRandomImages))];
	return '<img src="'+pathToImages+img+'" width="165" height="158" alt="'+img+'" border="0" />';
}

function matchHeight(){
	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(/\bcontainer\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)+5;
		}
	}
	// assign maximum height value to all of container <div> elements
	for(var i=0;i<contDivs.length;i++){
		contDivs[i].style.height=maxHeight+'px';
	}
}
// execute function when page loads
window.onload=function(){
	if(document.getElementsByTagName){
		matchHeight();
	}
}