function cleardown_search(){	
	if(document.searchForm.search.value == 'search'){
		document.searchForm.search.value = '';
	}else{
		document.searchForm.search.value = '';
	}
}

function search(){
	document.searchForm.submit();
}

function ecalc_calculate(carbon_per_kwh){
	
	var tariff_cost = document.getElementById('tariff_cost_per_kwh').value;
	var no_lamps =  document.getElementById('no_lamps').value;
	var watts_per_lamp =  document.getElementById('watts_per_lamp').value;
	var hours_per_day =  document.getElementById('hours_per_day').value;
	var hours_occupied_per_day =  document.getElementById('hours_occupied_per_day').value;
		
	if(tariff_cost > 0 && no_lamps > 0 && watts_per_lamp > 0 && hours_per_day > 0 && hours_occupied_per_day > 0){
		document.getElementById('cost_per_kwh').value = tariff_cost;
		document.getElementById('energy_uncontrolled').value = ((hours_per_day * watts_per_lamp * no_lamps * 365) /1000).toFixed(2) ;	
		document.getElementById('energy_controlled').value =( (hours_occupied_per_day * watts_per_lamp * no_lamps * 365) /1000 ).toFixed(2);			
		var cost_uncontrolled = 	(tariff_cost * document.getElementById('energy_uncontrolled').value / 100 ).toFixed(2);			
		document.getElementById('cost_uncontrolled').value = '£'+cost_uncontrolled;
		document.getElementById('co2_uncontrolled').value = (carbon_per_kwh * document.getElementById('energy_uncontrolled').value).toFixed(2) ;					
		var cost_controlled = 	(tariff_cost * document.getElementById('energy_controlled').value / 100 ).toFixed(2);							
		document.getElementById('cost_controlled').value = '£'+cost_controlled;		
		document.getElementById('co2_controlled').value = (carbon_per_kwh * document.getElementById('energy_controlled').value).toFixed(2) ;							
		document.getElementById('cost_saving').value = '£'+(cost_uncontrolled - cost_controlled).toFixed(2);
		document.getElementById('co2_saving').value = (document.getElementById('co2_uncontrolled').value - document.getElementById('co2_controlled').value).toFixed(2);
		document.getElementById('energy_saving').value =( (1 - document.getElementById('energy_controlled').value / document.getElementById('energy_uncontrolled').value) * 100).toFixed(0)+'%';

	}else{
		document.getElementById('cost_per_kwh').value = '';
		document.getElementById('energy_uncontrolled').value = '';
		document.getElementById('energy_controlled').value = '';
		document.getElementById('cost_uncontrolled').value = '';
		document.getElementById('co2_uncontrolled').value = '';
		document.getElementById('cost_controlled').value = '';
		document.getElementById('co2_controlled').value = '';
		document.getElementById('cost_saving').value = '';
		document.getElementById('co2_saving').value = '';
		document.getElementById('energy_saving').value = '';
	}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}