// accessability text size

var min=8;
var max=18;
function increaseFontSize() {
   var p = document.getElementsByTagName('p');
   for(i=0;i<p.length;i++) {
	  if(p[i].style.fontSize) {
		 var s = parseInt(p[i].style.fontSize.replace("px",""));
	  } else {
		 var s = 12;
	  }
	  if(s!=max) {
		 s += 1;
	  }
	  p[i].style.fontSize = s+"px"
   }
   
   var a = document.getElementsByTagName('a');
   for(i=0;i<p.length;i++) {
	  if(a[i].style.fontSize) {
		 var s = parseInt(p[i].style.fontSize.replace("px",""));
	  } else {
		 var s = 12;
	  }
	  if(s!=max) {
		 s += 1;
	  }
	  a[i].style.fontSize = s+"px"
   }
}

function decreaseFontSize() {
   var p = document.getElementsByTagName('p');
   for(i=0;i<p.length;i++) {
	  if(p[i].style.fontSize) {
		 var s = parseInt(p[i].style.fontSize.replace("px",""));
	  } else {
		 var s = 12;
	  }
	  if(s!=min) {
		 s -= 1;
	  }
	  p[i].style.fontSize = s+"px"
   }   

   var a = document.getElementsByTagName('a');
   for(i=0;i<p.length;i++) {
	  if(a[i].style.fontSize) {
		 var s = parseInt(p[i].style.fontSize.replace("px",""));
	  } else {
		 var s = 12;
	  }
	  if(s!=min) {
		 s -= 1;
	  }
	  a[i].style.fontSize = s+"px"
   }   
}

function alterContent() {
    var updateDiv, // The div for which the styles are switched    
        trigger, // The link that fires the function
		toggle1 = "View Low Contrast Version", // Text for link to view low contrast
        toggle2 = "View High Contrast Version", // Text for link to view high contrast
        class1  = "low-contrast", // Class name for low contrast
        class2  = "high-contrast"; // Class name for high contrast
    
    // Check the browser supports getElementById
    if(!document.getElementById) { return; }

    // Find the div with the id trigger
    trigger = document.getElementById("contrast");
    
    // If it isn't there return
    if (!trigger) { return;}    
    
    //It is there so do some stuff
    trigger.onclick = function(){
        // Find div that holds the content
        updateDiv = document.getElementById("updateDiv");
        
        // If it isn't there return
        if (!updateDiv) { return;}

        // It is there so switch classes
        // Find out what the link is first
        // If it is class 1 then switch to class 2
        if (updateDiv.className == class1){
            // Switch class
            updateDiv.className = class2;
            // Switch text
            trigger.firstChild.nodeValue= toggle1;
            // Disable the link by returning false        
            return false;
        }
        else{
            // It must be class 2 so switch to class 1
            updateDiv.className = class1;
            // Switch text
            trigger.firstChild.nodeValue= toggle2;
            // Disable the link by returning false
            return false;
        }
    }    
}