home_but_up = new Image();
home_but_up.src = "images_static/mh_navhom_u.gif";
home_but_over = new Image();
home_but_over.src = "images_static/mh_navhom_o.gif";
contact_but_up = new Image();
contact_but_up.src = "images_static/mh_navcon_u.gif";
contact_but_over = new Image();
contact_but_over.src = "images_static/mh_navcon_o.gif";
visit_but_up = new Image();
visit_but_up.src = "images_static/mh_navvis_u.gif";
visit_but_over = new Image();
visit_but_over.src = "images_static/mh_navvis_o.gif";
tab_details_up = new Image();
tab_details_up.src = "images_dynamic/page_heading_iris.gif";
tab_details_over = new Image();
tab_details_over.src = "images_dynamic/page_heading_iris.gif";
tab_comments_up = new Image();
tab_comments_up.src = "images_dynamic/page_heading_iris.gif";
tab_comments_over = new Image();
tab_comments_over.src = "images_dynamic/page_heading_iris.gif";
tab_collections_up = new Image();
tab_collections_up.src = "images_dynamic/page_heading_iris.gif";
tab_collections_over = new Image();
tab_collections_over.src = "images_dynamic/page_heading_iris.gif";


function clickCursor(){
document.body.style.cursor = 'pointer';
}

function autoCursor(){
document.body.style.cursor = 'auto';
}
			
function swapRollOver(){
	if (document.images){
				document[swapRollOver.arguments[0]].src = eval(swapRollOver.arguments[1] + ".src");
	}
}

var ddequalcolumns=new Object()
ddequalcolumns.columnswatch=["leftpane", "middlepane", "rightpane"]

ddequalcolumns.setHeights=function(reset){
var tallest=0
var resetit=(typeof reset=="string")? true : false
for (var i=0; i<this.columnswatch.length; i++){
if (document.getElementById(this.columnswatch[i])!=null){
if (resetit)
document.getElementById(this.columnswatch[i]).style.height="auto"
if (document.getElementById(this.columnswatch[i]).offsetHeight>tallest)
tallest=document.getElementById(this.columnswatch[i]).offsetHeight
}
}
if (tallest>0){
for (var i=0; i<this.columnswatch.length; i++){
if (document.getElementById(this.columnswatch[i])!=null)
document.getElementById(this.columnswatch[i]).style.height=tallest+"px"
}
}
}

ddequalcolumns.resetHeights=function(){
this.setHeights("reset")
}

ddequalcolumns.dotask=function(target, functionref, tasktype){ //assign a function to execute to an event handler (ie: onunload)
var tasktype=(window.addEventListener)? tasktype : "on"+tasktype
if (target.addEventListener)
target.addEventListener(tasktype, functionref, false)
else if (target.attachEvent)
target.attachEvent(tasktype, functionref)
}

ddequalcolumns.dotask(window, function(){ddequalcolumns.setHeights()}, "load");
ddequalcolumns.dotask(window, function(){if (typeof ddequalcolumns.timer!="undefined") clearTimeout(ddequalcolumns.timer); ddequalcolumns.timer=setTimeout("ddequalcolumns.resetHeights()", 200)}, "resize");