var bwidth;
var bheight;

function getdimensions()
{
  if( typeof( window.innerWidth ) == 'number' ){
    bwidth = window.innerWidth;
    bheight = window.innerHeight;
  } 
  else if( (document.documentElement) && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ){
    bwidth = document.documentElement.clientWidth;
    bheight = document.documentElement.clientHeight;
  }
  else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ){
    bwidth = document.body.clientWidth;
    bheight = document.body.clientHeight - 50;
  }
}

function getItem(id){
	var itm = false;
   if(document.getElementById){
	   itm = document.getElementById(id);
   }else if(document.all){
      itm = document.all[id];
   }else if(document.layers){
      itm = document.layers[id];
   }
   return itm;
}

function setJobSizeImage(sizeStr, sizeVal){
	var jobSizeImg = getItem('jobSize');
	if (jobSizeImg){
 	   jobSizeImg.src = "images/jobSize_" + sizeStr + ".jpg";
	   jobSizeImg.alt = sizeStr + " job size";
	}
}
  
function selectSystem(systemImg, systemRadio){
	var radio = getItem(systemRadio);
		
	radio.checked = "checked";
  	setOpacity(systemImg, radio);
}
  
function setOpacity(systemImg){
   var sysImages = document.images;

   for (var i=0; i<sysImages.length; i++){
		if(sysImages[i].name == "sysImage"){
			if(sysImages[i].style.MozOpacity) sysImages[i].style.MozOpacity='0.4';
			if(sysImages[i].filters) sysImages[i].filters.alpha.opacity='40';
		}
   }

	var itm = getItem(systemImg);
	if(itm){
		if(itm.style.MozOpacity) itm.style.MozOpacity='1.0';
		if(itm.filters) itm.filters.alpha.opacity='100';   
	}
}