/* Functions for diagram pages */

// A few constants. Red circle image is 115 x 83
var circleW=115,
	circleH=83,
	circleCtrX=Math.round(circleW / 2),
	circleCtrY=Math.round(circleH / 2);

function showBlurb(blurbId, x, y) {

	hideBlurbs()

	if(!document.getElementById) return false

	var elem=document.getElementById(blurbId);

	if(elem){
		with(elem.style){
			display="block"
			top=(y)+"px"
			left=(x)+"px"
		}
	}
}

function hideBlurbs() {

	if(!document.getElementsByTagName) return false

	var divs=document.getElementsByTagName("div")

	for(var i=0; i<divs.length; ++i){
		var thisDiv=divs[i]
		if(thisDiv.className=="blurb") {
			thisDiv.style.display="none"
		}
	}
}